浮点大法好
#include<iostream>
#include<math.h>
#include<iomanip>
using namespace std
;
int main(void) {
double n
;
cin
>>n
;
if(n
<0)cout
<<0;
else cout
<<fixed
<<setprecision(0)<<pow((int)(pow(n
,0.5))==pow(n
,0.5)?(int)(pow(n
,0.5)):(int)(pow(n
,0.5))+1,2);
return 0;
}
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