Problem p00192 (C++)

Buggy submission (status: Time Limit Exceeded):
#include <iostream>
#include <vector>
using namespace std;

int main() {
  while (true) {
    int m, n;
    cin >> m >> n;
    vector<int> C(n); //	Ô
    for (int i = 0; i < n; i++)
      cin >> C[i];
    vector<int> U(m, -1); //	ã
    vector<int> D(m, -1); //	º
    vector<int> S;        //	ÔÒ¿
    vector<int> ans;      //	¦

    for (int t = 0; (int)ans.size() < n; t++) {
      //	oÉ
      for (int i = 0; i < m; i++) {
        if (D[i] >= 0)
          if (--C[D[i]] <= 0)
            ans.push_back(D[i]), D[i] = -1;
        if (U[i] >= 0)
          if (--C[U[i]] <= 0 && D[i] == -1)
            ans.push_back(U[i]), U[i] = -1;
      }

      //	üÉ
      if (t % 10 == 0 && t / 10 < n)
        S.push_back(t / 10);
      if (S.size() > 0) {
        bool f = false;
        for (int i = 0; i < m && !f; i++)
          if (U[i] == -1 && D[i] == -1)
            U[i] = S[0], f = true;
        if (!f) {
          int mn = 99999999;
          int mi;
          for (int i = 0; i < m; i++)
            if (D[i] == -1)
              if (C[U[i]] >= C[S[0]])
                if (C[U[i]] - C[S[0]] < mn)
                  mn = C[U[i]] - C[S[0]], mi = i;
          if (mn < 99999999)
            D[mi] = S[0], f = true;
        }
        if (!f) {
          int mn = 99999999;
          int mi;
          for (int i = 0; i < m; i++)
            if (D[i] == -1)
              if (C[S[0]] - C[U[i]] < mn)
                mn = C[S[0]] - C[U[i]], mi = i;
          if (mn < 99999999)
            D[mi] = S[0], f = true;
        }

        if (f)
          S.erase(S.begin());
      }
    }

    for (int i = 0; i < (int)ans.size(); i++)
      cout << (i > 0 ? " " : "") << ans[i] + 1;
    cout << endl;
  }
  return 0;
}

Fixed submission:
#include <iostream>
#include <vector>
using namespace std;

int main() {
  while (true) {
    int m, n;
    cin >> m >> n;
    if (m == 0 && n == 0)
      break;
    vector<int> C(n); //	Ô
    for (int i = 0; i < n; i++)
      cin >> C[i];
    vector<int> U(m, -1); //	ã
    vector<int> D(m, -1); //	º
    vector<int> S;        //	ÔÒ¿
    vector<int> ans;      //	¦

    for (int t = 0; (int)ans.size() < n; t++) {
      //	oÉ
      for (int i = 0; i < m; i++) {
        if (D[i] >= 0)
          if (--C[D[i]] <= 0)
            ans.push_back(D[i]), D[i] = -1;
        if (U[i] >= 0)
          if (--C[U[i]] <= 0 && D[i] == -1)
            ans.push_back(U[i]), U[i] = -1;
      }

      //	üÉ
      if (t % 10 == 0 && t / 10 < n)
        S.push_back(t / 10);
      if (S.size() > 0) {
        bool f = false;
        for (int i = 0; i < m && !f; i++)
          if (U[i] == -1 && D[i] == -1)
            U[i] = S[0], f = true;
        if (!f) {
          int mn = 99999999;
          int mi;
          for (int i = 0; i < m; i++)
            if (D[i] == -1)
              if (C[U[i]] >= C[S[0]])
                if (C[U[i]] - C[S[0]] < mn)
                  mn = C[U[i]] - C[S[0]], mi = i;
          if (mn < 99999999)
            D[mi] = S[0], f = true;
        }
        if (!f) {
          int mn = 99999999;
          int mi;
          for (int i = 0; i < m; i++)
            if (D[i] == -1)
              if (C[S[0]] - C[U[i]] < mn)
                mn = C[S[0]] - C[U[i]], mi = i;
          if (mn < 99999999)
            D[mi] = S[0], f = true;
        }

        if (f)
          S.erase(S.begin());
      }
    }

    for (int i = 0; i < (int)ans.size(); i++)
      cout << (i > 0 ? " " : "") << ans[i] + 1;
    cout << endl;
  }
  return 0;
}