Submission #204609

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Source Code Expand

#include <cstdio>
#include <vector>
using namespace std;
#define rep(i,n) for(int i = 0; i < n; i++)
int n;
double ans = 0.0;
int main(){
	scanf("%d", &n);
	vector<int> c(n);
	rep(i,n) scanf("%d", &c[i]);
	rep(i,n){
		int tmp = 0;
		rep(j,n) if(c[i]%c[j]==0) tmp++;
		if(tmp%2==0) ans += 0.5;
		else ans += (double)(tmp+1)/(double)(2*tmp);
	}
	printf("%.9f\n",ans);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:8:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
./Main.cpp:10:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]

Judge Result