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guqingchen

[C++] 纯文本查看 复制代码

#include<bits\stdc++.h>
#include<cmath>
using namespace std;
int main(){
    int R;
    int e=0,r=0;
    double X,Y,Z;
    cin>>R;
    for(int i=1;i<=R;i++){
        for(int j=2;j<=R;j++){
            X=i;
            Y=j;
            Z*Z=X*X+Y*Y;
            r=int(Z*Z);
            if(r<=R){
                e=e+1;
            }
        }
    }
    cout<<e;
    return 0;
}