1084：幂的末尾-信息学奥赛一本通

#include<algorithm>

#include<cmath>

#include<cstdio>

#include<iostream>

#include<iomanip>

using namespace std;

int main(){

int a,b,r=1;

cin>>a>>b;

for(int i=1;i<=b;i++){

r*=a;

r%=1000;

}

if(r/100>0){

cout<<r;

}

else if(r/10>0){

cout<<"0"<<r; 

}

else{

cout<<"00"<<r;

}

 

return 0;

}