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ShashankSinha98 ShashankSinha98

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46. DP Problems Set - II
- 2. Grid - I.py
47. DP Problems Set - III
- 1. coins.py

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`‎46. DP Problems Set - II/2. Grid - I.py‎`

Lines changed: 40 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,40 @@`
	`1`	`+n, m = [int(i) for i in input().split()]`
	`2`	`+MOD = 10**9+7`
	`3`	`+arr = [[0]*m for i in range(n)]`
	`4`	`+`
	`5`	`+for i in range(n):`
	`6`	`+ inp = input()`
	`7`	`+ for j in range(m):`
	`8`	`+ arr[i][j] = inp[j]`
	`9`	`+`
	`10`	`+`
	`11`	`+`
	`12`	`+`
	`13`	`+`
	`14`	`+def solve(arr,n,m):`
	`15`	`+`
	`16`	`+ dp = [[0]*(m+1) for i in range(n+1)]`
	`17`	`+`
	`18`	`+ for i in range(1,n+1):`
	`19`	`+ if arr[i-1][0]=='#':`
	`20`	`+ break`
	`21`	`+ dp[i][1] = 1`
	`22`	`+`
	`23`	`+ for i in range(1,m+1):`
	`24`	`+ if arr[0][i-1]=='#':`
	`25`	`+ break`
	`26`	`+ dp[1][i] = 1`
	`27`	`+`
	`28`	`+ #print(dp)`
	`29`	`+`
	`30`	`+ for i in range(2,n+1):`
	`31`	`+ for j in range(2,m+1):`
	`32`	`+`
	`33`	`+ if arr[i-1][j-1]=='#':`
	`34`	`+ continue`
	`35`	`+`
	`36`	`+ dp[i][j] = (dp[i-1][j] + dp[i][j-1])%MOD`
	`37`	`+`
	`38`	`+ return dp[n][m]%MOD`
	`39`	`+`
	`40`	`+print(solve(arr,n,m))`

`‎47. DP Problems Set - III/1. coins.py‎`

Lines changed: 25 additions & 0 deletions

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,25 @@`
	`1`	`+n = int(input())`
	`2`	`+arr = [float(i) for i in input().split()]`
	`3`	`+`
	`4`	`+`
	`5`	`+def solve(arr,n,x):`
	`6`	`+ global dp`
	`7`	`+ if x==0:`
	`8`	`+ return 1`
	`9`	`+`
	`10`	`+ if n==0:`
	`11`	`+ return 0`
	`12`	`+`
	`13`	`+ if dp[n][x]> -0.9:`
	`14`	`+ return dp[n][x]`
	`15`	`+`
	`16`	`+ dp[n][x] = round(arr[n-1]solve(arr,n-1,x-1),3) + round((1-arr[n-1])solve(arr,n-1,x),3)`
	`17`	`+`
	`18`	`+ return round(dp[n][x],3)`
	`19`	`+`
	`20`	`+x = (n+1)//2`
	`21`	`+dp = [[-1]*(x+1) for i in range(n+1)]`
	`22`	`+print(solve(arr,n,x))`
	`23`	`+print(dp)`
	`24`	`+`
	`25`	`+`

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