虽然只有一种味道，但真的很 鲜~

葵花籽味

#include <iostream>
#include <cmath>
using namespace std;
long long n;
long long k;
long long num[15];
string snum;
int main() {
    cin >> n;
    while (n--) {
        cin >> k >> snum;
        long long ans = 0;
        for (long long i = 0; i < snum.size(); i++) {
            if (!(snum[i] >= '0' && snum[i] <= '9')) {
                num[i] = snum[i]-'A'+10;
            } else {
                num[i] = snum[i]-'0';
            }
            ans = ans * k + num[i];
        }
        cout << ans << endl;
    }
    return 0;
}

#define LL long long
using namespace std;
const int N = 1010;
int n;
LL solve(int k, string s){
    LL res = 0;
    for(int i=0;i<s.size();i++){
        char c = s[i];
        int num;
        if(c >= '0' && c <= '9') num = c - '0';
        else num = c - 'A' + 10;
        res = res * k + num;
    }
    return res;
}
int main(){
    cin>>n;
    while(n--){
        int k;
        string s;
        cin>>k>>s;
        cout<<solve(k,s)<<endl;
    }
    return 0;
}
//:)
//114514
`

包AC