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add: 220405-CN [cpp]

This commit is contained in:
Lam Haoyin 2022-04-05 21:37:17 +08:00
parent f6badffceb
commit 86cb6cbe4b
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2 changed files with 23 additions and 1 deletions
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22
cpp/2204/220405-CN.cpp Normal file
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@ -0,0 +1,22 @@
#include <iostream>
class Solution {
private:
static inline const int IS_PRIME[32] = {0, 0, 1, 1, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 1, 0, 0, 0, 1, 0, 0, 0, 0, 0, 1, 0, 1};
public:
static int countPrimeSetBits(int left, int right) {
int ret = 0;
for (int i = left; i <= right; ++i) {
int x = 0;
for (int n = i; n; n >>= 1)
x += n & 1;
ret += IS_PRIME[x];
}
return ret;
}
};
int main() {
std::printf("%d\n", Solution::countPrimeSetBits(6, 10));
return 0;
}

2
cpp/2204/CMakeLists.txt
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@ -3,4 +3,4 @@ PROJECT(2204)
SET(CMAKE_CXX_STANDARD 23)
ADD_EXECUTABLE(2204 220406.cpp)
ADD_EXECUTABLE(2204 220405-CN.cpp)