锰锌代码MLE求助，码风良好悬关

rt

#include <bits/stdc++.h>
using namespace std;

int c[130];

bool hui(long long x){
    return (x == hui(x));
}

long long fan(long long x){
    long long sum = 0;
    while (x){
        sum = sum*10+x%10;
        x /= 10;
    }
    return sum;
}

int main(){
    c['1'] = 1;
    c['2'] = 2;
    c['3'] = 3;
    c['4'] = 4;
    c['5'] = 5;
    c['6'] = 6;
    c['7'] = 7;
    c['8'] = 8;
    c['9'] = 9;
    c['0'] = 0;
    c['a'] = 10;
    c['b'] = 11;
    c['c'] = 12;
    c['d'] = 13;
    c['e'] = 14;
    c['f'] = 15;
    int jz;
    string s;
    cin >> jz >> s;
    long long n = 0, sum = 1;
    for (int i = 0; i <= s.size(); i++){
        n += sum*c[s[i]];
        sum *= jz;
    }
    for (int i = 1; i <= 30; i++){
        if (hui(i)){
            printf("STEP=%d\n", i);
            return 0;
        }
        n += fan(n);
    }
    printf("Impossible!\n");
    return 0;
}