func_code_string: #include <bits/stdc++.h>   using namespace std;   long long ar[100010];   unordered_map<long long, long long> um;   int main() {     ios::sync_with_stdio(0);     cin.tie(0);     cout.tie(0);     long long t, n, x, ans, y, prev;     scanf( %lld , &t);     long long sm = 0;     while (t--) {       scanf( %lld , &n);       scanf( %lld , &x);       for (int i = 0; i < n; i++) {         scanf( %lld , &ar[i]);       }       sm = 0;       prev = ans = -1;       for (long long i = 0; i < n; i++) {         sm = (sm + ar[i]) % x;         if (sm && prev == -1) prev = i;         if (sm)           ans = i + 1;         else if (prev != -1)           ans = max(ans, i - prev);       }       cout << ans <<   n ;     }     return 0;   }   