Submission #4784

#TimeUsernameProblemLanguageResultExecution timeMemory
4784gs13068제곱근 구하기 2 (gs13068_sqrt2)C++98
1 / 1
0 ms1088 KiB
#include<cstdio>

int main()
{
	long long i,n;
	scanf("%lld",&n);
	for(i=1;i*i<=n;i++);
	if((n-(i-1)*(i-1))*(2*i)+(i*i-n)*(2*(i-1))<(2*(i-1))*(2*i))printf("%lld.%06lld",i-1,((n-(i-1)*(i-1))*1000000+(i-1))/(2*(i-1)));
	else printf("%lld.%06lld",i-1,((2*i-i*i+n)*1000000+i)/(2*i));
}
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