Submission #16377

#	Time	Username	Problem	Language	Result	Execution time	Memory
16377		eaststar	제곱근 구하기 2 (gs13068_sqrt2)	C++14	1 / 1	0 ms	1084 KiB

sqrt2

#include <stdio.h>
int main(){
    long long i,n;
    scanf("%lld",&n);
    for(i=1;i*i<=n;++i);
    if((double)(n-(i-1)*(i-1))/2/(i-1)<(double)(i*i-n)/2/i)--i;
    printf("%lf",i+(double)(n-i*i)/2/i);
    return 0;
}

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