func_code_string: #include <bits/stdc++.h>   const long long md = (1e9 + 7);   const long long fakmd = 998244353;   using namespace std;   long long n, m;   pair<long long, long long> a[100100];   long long ans[100100];   int32_t main() {     cin >> n >> m;     long long it = 1;     long long sum = 0;     for (long long i = 1; i <= m; i++) {       cin >> a[i].first;       sum += a[i].first;       a[i].second = i;     }     if (sum < n) {       return cout << -1, 0;     }     for (long long i = 1; i <= m; i++) {       sum -= a[i].first;       long long ln = max((n - it + 1) - sum, 1ll);       if (ln > a[i].first || it + a[i].first - 1 > n) {         return cout << -1, 0;       }       ans[a[i].second] = it;       it += ln;     }     if (it < n) {       cout << -1;     } else {       for (long long i = 1; i <= m; i++) {         cout << ans[i] <<    ;       }     }     return 0;   }   