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#include<stdio.h>#include<math.h>using namespace std;int main(){int t;scanf("%d",&t);while(t--){int n;scanf("%d",&n);int k = sqrt(double((n - 1) * 2 + 1.0 / 4)) - 0.5;if(k * (k + 1) == (n - 1) * 2){puts("1");}else puts("0");}return 0;}
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原文地址:http://www.cnblogs.com/qhy285571052/p/dc53c3286205fd3eafe0b056429024d7.html