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add 172 folder & cpp, add 190 folder & cpp, add 434 folder & cpp #28

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Merged

yanglbme merged 1 commit into doocs:master from zouwx2cs:master

Oct 19, 2018

Merged

add 172 folder & cpp, add 190 folder & cpp, add 434 folder & cpp #28

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add 172 folder & cpp, add 190 folder & cpp, add 434 folder & cpp

zouwx2cs Oct 19, 2018

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9 changes: 9 additions & 0 deletions solution/172.Factorial Trailing Zeroes/Solution.cpp

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Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,9 @@
	class Solution {
	public:
	int trailingZeroes(int n) {
	int cnt5 = 0 ;
	for (long long i = 5; i <= n; i *= 5)
	cnt5 += n/i ;
	return cnt5 ;
	}
	};

16 changes: 16 additions & 0 deletions solution/190.Reverse Bits/Solution.cpp

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Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,16 @@
	class Solution {
	public:
	uint32_t reverseBits(uint32_t n) {
	uint32_t res = 0 ;
	uint32_t tmp = 1 << 31 ;
	while (n)
	{
	if (n&1)
	res \|= tmp ;
	tmp >>= 1 ;
	n >>= 1 ;
	}

	return res ;
	}
	};

13 changes: 13 additions & 0 deletions solution/434.Number of Segments in a String/Solution.cpp

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Original file line number	Diff line number	Diff line change
		@@ -0,0 +1,13 @@
	class Solution {
	public:
	int countSegments(string s) {
	if (s.length() < 1)
	return 0 ;

	int cnt = isspace(s[0])? 0: 1 ;
	for (int i = 1; i < s.length(); ++i)
	if (!isspace(s[i]) && isspace(s[i-1]))
	++cnt ;
	return cnt ;
	}
	};