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Commit e744e99

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Add submissions for Snackdown17 PreElims
1 parent 55b9159 commit e744e99

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5 files changed

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5 files changed

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lines changed

‎SnackDown17/PreElimA/CONSESNK.cpp

Lines changed: 106 additions & 0 deletions
Original file line numberDiff line numberDiff line change
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#include <bits/stdc++.h>
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#define ll long long
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#define ull unsigned long long
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#define vi vector<ll>
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#define pp pair<ll,ll>
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#define mp make_pair
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#define PI acos(-1.0)
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#define all(v) v.begin(),v.end()
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#define pb push_back
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#define FOR(i,a,b) for(i=a;i<b;i++)
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#define FREV(i,a,b) for(i=a;i>=b;i--)
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#define SULL(n) scanf("%llu", &n)
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#define INF 1e18
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#define MOD 1000000007
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#ifndef ONLINE_JUDGE
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#define gc getchar
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#define pc putchar
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#else
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#define gc getchar_unlocked
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#define pc putchar_unlocked
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#endif
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using namespace std;
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int read_int() {
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char c = gc();
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while((c < '0' || c > '9') && c != '-') c = gc();
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int ret = 0, neg = 0;
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if (c == '-') neg = 1, c = gc();
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while(c >= '0' && c <= '9') {
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ret = 10 * ret + c - 48;
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c = gc();
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}
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return neg ? -ret : ret;
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}
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ll read_ll() {
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char c = gc();
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while((c < '0' || c > '9') && c != '-') c = gc();
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ll ret = 0;
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int neg = 0;
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if (c == '-') neg = 1, c = gc();
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while(c >= '0' && c <= '9') {
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ret = 10 * ret + c - 48;
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c = gc();
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}
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return neg ? -ret : ret;
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}
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vi arr;
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ll n,l,a,b;
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ll abs_sum(ll position) {
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ll i,sum = 0;
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FOR(i,0,n) {
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sum += abs(arr[i]-(position + i * l));
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}
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return sum;
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}
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void ternary_search() {
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ll low = a, high = b - n*l,mid_l,mid_r;
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ll val_l, val_r, res = INF;
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// cout << "low = " << low << " high = " << high << endl;
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while(low <= high) {
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// cout << "low = " << low << " high = " << high << endl;
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mid_l = low + (high - low)/3;
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mid_r = high - (high - low)/3;
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val_l = abs_sum(mid_l);
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val_r = abs_sum(mid_r);
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if(val_l < val_r) {
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high = mid_r - 1;
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}
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else {
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low = mid_l + 1;
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}
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// cout << "val_l = " << val_l << " val_r = " << val_r << endl;
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res = min(res,min(val_l,val_r));
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}
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printf("%lld\n", res);
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}
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int main() {
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ll i,j,t;
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t = read_ll();
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while (t--) {
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n = read_ll();
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l = read_ll();
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a = read_ll();
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b = read_ll();
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arr.resize(n);
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FOR(i,0,n) {
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arr[i] = read_ll();
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}
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sort(all(arr));
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ternary_search();
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}
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return 0;
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}

‎SnackDown17/PreElimA/ISSNAKE.cpp

Lines changed: 134 additions & 0 deletions
Original file line numberDiff line numberDiff line change
@@ -0,0 +1,134 @@
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#include <bits/stdc++.h>
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#define ll long long
3+
#define ull unsigned long long
4+
#define vi vector<ll>
5+
#define pp pair<ll,ll>
6+
#define mp make_pair
7+
#define PI acos(-1.0)
8+
#define all(v) v.begin(),v.end()
9+
#define pb push_back
10+
#define FOR(i,a,b) for(i=a;i<b;i++)
11+
#define FREV(i,a,b) for(i=a;i>=b;i--)
12+
#define SULL(n) scanf("%llu", &n)
13+
#define INF 1e18
14+
#define MOD 1000000007
15+
16+
#ifndef ONLINE_JUDGE
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#define gc getchar
18+
#define pc putchar
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#else
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#define gc getchar_unlocked
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#define pc putchar_unlocked
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#endif
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using namespace std;
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int read_int() {
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char c = gc();
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while((c < '0' || c > '9') && c != '-') c = gc();
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int ret = 0, neg = 0;
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if (c == '-') neg = 1, c = gc();
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while(c >= '0' && c <= '9') {
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ret = 10 * ret + c - 48;
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c = gc();
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}
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return neg ? -ret : ret;
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}
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ll read_ll() {
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char c = gc();
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while((c < '0' || c > '9') && c != '-') c = gc();
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ll ret = 0;
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int neg = 0;
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if (c == '-') neg = 1, c = gc();
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while(c >= '0' && c <= '9') {
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ret = 10 * ret + c - 48;
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c = gc();
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}
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return neg ? -ret : ret;
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}
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char grid[2][505];
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int main() {
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ll i,j,t,n;
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t = read_ll();
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while(t--) {
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n = read_ll();
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bool flag = true;
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FOR(i,0,n) {
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cin >> grid[0][i];
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}
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FOR(i,0,n) {
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cin >> grid[1][i];
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}
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i = 0;
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while(grid[0][i] == '.' && grid[1][i] == '.') {
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i++;
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}
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int prev_hash_row = -1;
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int double_hash_count = 0;
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while(i<n) {
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if(grid[0][i] == '#' && grid[1][i] == '#') {
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i++;
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double_hash_count++;
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}
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else if(grid[0][i] == '.' && grid[1][i] == '#') {
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if(prev_hash_row != -1) {
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if((double_hash_count%2 == 0 && prev_hash_row == 0) || (double_hash_count%2 == 1 && prev_hash_row == 1)) {
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flag = false;
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break;
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}
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else {
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prev_hash_row = 1;
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}
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}
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else {
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prev_hash_row = 1;
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}
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double_hash_count = 0;
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i++;
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}
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else if(grid[0][i] == '#' && grid[1][i] == '.') {
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if(prev_hash_row != -1) {
97+
if((double_hash_count%2 == 0 && prev_hash_row == 1) || (double_hash_count%2 == 1 && prev_hash_row == 0)) {
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flag = false;
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break;
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}
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else {
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prev_hash_row = 0;
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}
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}
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else {
106+
prev_hash_row = 0;
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}
108+
double_hash_count = 0;
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i++;
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}
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else {
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i++;
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break;
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}
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// cout << "prev_hash_row = "<<prev_hash_row<<" double_hash_count = "<<double_hash_count<<endl;
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}
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if(flag) {
118+
while(i<n) {
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if(grid[0][i] != '.' || grid[1][i] != '.') {
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printf("no\n");
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break;
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}
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i++;
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}
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if(i >= n)
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printf("yes\n");
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}
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else {
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printf("no\n");
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}
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}
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return 0;
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}

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