Submission #998865

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Source Code Expand

#include<map>
#include<set>
#include<cmath>
#include<regex>
#include<queue>
#include<stack>
#include<bitset>
#include<vector>
#include<cstdio>
#include<string>
#include<cstring>
#include<iostream>
#include<algorithm>
#include<unordered_map>

#pragma warning(disable:4996)
using namespace std;

int main() {
	double r1, r2;
	scanf("%lf%lf",&r1,&r2);
	printf("%.12f\n",r1*r2/(r1+r2));
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:21:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%lf%lf",&r1,&r2);
                         ^

Judge Result