洛谷 P1143 进制转换

#include <bits/stdc++.h>
using namespace std;
int main(){
    int n,m;
    string x;
    cin>>n>>x>>m;
    string ant = to_string(stoi(x,0,n));
    long i = 0,j = stoi(ant),a[499999];
    while(j>0){
        a[i] = j%m;
        j /= m;
        i++;
    }
    while(i){
        cout<<a[--i];
    }
    return 0;
}