Submission #27239

#	Time	Username	Problem	Language	Result	Execution time	Memory
27239		TAMREF	제곱근 구하기 2 (gs13068_sqrt2)	C++11	1 / 1	0 ms	2032 KiB

sqrt2

#include <bits/stdc++.h>
using namespace std;
int main(){
    long long n,a;
    double ans;
    scanf("%lld",&n);
    a=(long long)sqrt(n);
    if(n-a*a>a){
        ++a;
        ans=(1.-(double)(a*a-n)/(2*a*a))*a;
    }else{
        ans=(1.+(double)(n-a*a)/(2*a*a))*a;
    }
    printf("%.6f\n",ans);
}

Compilation message (stderr)

sqrt2.cpp: In function 'int main()':
sqrt2.cpp:6:21: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld",&n);
                     ^

• Subtask 1: 1 / 1