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#include<stdio.h>
#include<math.h>int fun(int n){int b;b= pow(n,0.5);printf("%d",b);}int main(){int n;scanf("%d",&n); fun(n);return 0;}
#include<stdio.h>
#include<math.h>int fun(int n){int b;b= pow(n,0.5);printf("%d",b);}int main(){int n;scanf("%d",&n); fun(n);return 0;}