求救

我实在不知道哪错了 测试点看不了 大佬们帮帮忙啊

#include<iostream>
using namespace std;
int main() {
    char a[200];
    int n;
    cin >> n;
    cin >> a;
    for (int i = 0; a[i]; i++) {
        int x = a[i];
        if (x >= 26 && x <= 122) {
            if (n > 26) {
                do { n -= 26; } while (n > 26);
            }
            if (x + n > 122) {
                int p = n - (122 - x);
                int m = p + 96;
                char n = m;
                cout << n;
            }
            else {
                int m = x + 1;
                char p = m;
                cout << p;
            }
        }
    }
    return 0;
}