func_code_string: #include <bits/stdc++.h>   using namespace std;   signed main() {     long long N, B;     cin >> N >> B;     vector<long long> res(N, -1);     queue<pair<long long, long long> > Q;     long long endTime = -1;     for (long long i = 0; i < N; i++) {       long long t, d;       cin >> t >> d;       while (endTime <= t) {         if (Q.size()) {           res[Q.front().second] = endTime = endTime + Q.front().first;           Q.pop();         } else {           endTime = t;           break;         }       }       if (Q.size() < B) {         Q.push({d, i});       }     }     while (Q.size()) {       res[Q.front().second] = endTime = endTime + Q.front().first;       Q.pop();     }     for (long long i = 0; i < N; i++) cout << res[i] <<    ;     cout << endl;   }   