Problem p01269 (C++) — buggy submission, verdict: Memory Limit Exceeded

#include <bits/stdc++.h>
using namespace std;
// #define int long long
using ll = long long;
using vi = vector<int>;
using vl = vector<long long>;
using pii = pair<int, int>;
using pll = pair<long long, long long>;
#define ITR(i, c) for (auto i = begin(c); i != end(c); ++i)
#define FORE(x, c) for (auto &x : c)
#define REPF(i, a, n) for (int i = a, i##len = (int)(n); i < i##len; ++i)
#define REP(i, n) REPF(i, 0, n)
#define REPR(i, n) for (int i = (int)(n); i >= 0; --i)
#define REPW(i, n) for (i = 0; i < (int)(n); ++i)
#define ALL(c) begin(c), end(c)
#define RALL(c) rbegin(c), rend(c) // c++14
#define SZ(c) ((int)c.size())
#define EXIST(c, x) (c.find(x) != end(c))
#define OUTOFRANGE(y, x, h, w) (y < 0 || x < 0 || y >= h || x >= w)
#define dump(...)
const int DX[9] = {0, 1, 0, -1, 1, 1, -1, -1, 0},
          DY[9] = {-1, 0, 1, 0, -1, 1, 1, -1, 0};
#define INF (1001001001)
#define INFLL (1001001001001001001ll)
template <class T> ostream &operator<<(ostream &os, const vector<T> &v) {
  ITR(i, v) os << *i << (i == end(v) - 1 ? "" : "\\n");
  return os;
}
template <class T> istream &operator>>(istream &is, vector<T> &v) {
  ITR(i, v) is >> *i;
  return is;
}
template <class T> istream &operator>>(istream &is, pair<T, T> &p) {
  is >> p.first >> p.second;
  return is;
}
template <class T> bool chmax(T &a, const T &b) {
  if (a < b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T> bool chmin(T &a, const T &b) {
  if (b < a) {
    a = b;
    return 1;
  }
  return 0;
}
//------------------------------------------------------------------------------
struct before_main_function {
  before_main_function() {
#ifdef int
#undef INF
#define INF INFLL
#define stoi stoll
#endif
    cin.tie(0);
    ios::sync_with_stdio(false);
    cout << setprecision(15) << fixed;
  }
} before_main_function;
//------------------------------------------------------------------------------

void solve(int N, int M, int L) {
  struct edge {
    int to;
    int left;
    int dist;
    int thief;
  };
  vector<vector<vector<edge>>> g(N, vector<vector<edge>>(110));
  REP(i, M) {
    int a, b, d, e;
    cin >> a >> b >> d >> e;
    REP(j, 110) {
      g[a - 1][j].push_back(edge{b - 1, j, d, e}); // ????????????
      if (j - d >= 0)
        g[a - 1][j].push_back(edge{b - 1, j - d, d, e}); // ??????
    }
    REP(j, 110) {
      g[b - 1][j].push_back(edge{a - 1, j, d, e}); // ????????????
      if (j - d >= 0)
        g[b - 1][j].push_back(edge{a - 1, j - d, d, e}); // ??????
    }
  }
  vector<vector<int>> dp(N, vector<int>(110, INF));
  dp[0][L] = 0;
  priority_queue<pair<int, pii>, vector<pair<int, pii>>,
                 greater<pair<int, pii>>>
      pq;
  pq.push({0, {0, L}});
  while (!pq.empty()) {
    int y = pq.top().second.first;
    int z = pq.top().second.second;
    pq.pop();
    FORE(e, g[y][z]) {
      if (z == e.left) {
        if (dp[e.to][e.left] > dp[y][z] + e.thief) {
          dp[e.to][e.left] = dp[y][z] + e.thief;
          pq.push({dp[e.to][e.left], {e.to, e.left}});
        }
      } else {
        if (dp[e.to][e.left] > dp[y][z]) {
          dp[e.to][e.left] = dp[y][z];
          pq.push({dp[e.to][e.left], {e.to, e.left}});
        }
      }
    }
  }
  int ans = INF;
  REP(i, 110) chmin(ans, dp[N - 1][i]);
  cout << ans << endl;
}
signed main() {
  while (1) {
    int N, M, L;
    cin >> N >> M >> L;
    if (N + M + L == 0)
      break;
    solve(N, M, L);
  }
  return 0;
}

Error: MLE

Fixed submission:

#include <bits/stdc++.h>
using namespace std;
#define int long long
using ll = long long;
using vi = vector<int>;
using vl = vector<long long>;
using pii = pair<int, int>;
using pll = pair<long long, long long>;
#define ITR(i, c) for (auto i = begin(c); i != end(c); ++i)
#define FORE(x, c) for (auto &x : c)
#define REPF(i, a, n) for (int i = a, i##len = (int)(n); i < i##len; ++i)
#define REP(i, n) REPF(i, 0, n)
#define REPR(i, n) for (int i = (int)(n); i >= 0; --i)
#define REPW(i, n) for (i = 0; i < (int)(n); ++i)
#define ALL(c) begin(c), end(c)
#define RALL(c) rbegin(c), rend(c) // c++14
#define SZ(c) ((int)c.size())
#define EXIST(c, x) (c.find(x) != end(c))
#define OUTOFRANGE(y, x, h, w) (y < 0 || x < 0 || y >= h || x >= w)
#define dump(...)
const int DX[9] = {0, 1, 0, -1, 1, 1, -1, -1, 0},
          DY[9] = {-1, 0, 1, 0, -1, 1, 1, -1, 0};
#define INF (1001001001)
#define INFLL (1001001001001001001ll)
template <class T> ostream &operator<<(ostream &os, const vector<T> &v) {
  ITR(i, v) os << *i << (i == end(v) - 1 ? "" : "\\n");
  return os;
}
template <class T> istream &operator>>(istream &is, vector<T> &v) {
  ITR(i, v) is >> *i;
  return is;
}
template <class T> istream &operator>>(istream &is, pair<T, T> &p) {
  is >> p.first >> p.second;
  return is;
}
template <class T> bool chmax(T &a, const T &b) {
  if (a < b) {
    a = b;
    return 1;
  }
  return 0;
}
template <class T> bool chmin(T &a, const T &b) {
  if (b < a) {
    a = b;
    return 1;
  }
  return 0;
}
//------------------------------------------------------------------------------
struct before_main_function {
  before_main_function() {
#ifdef int
#undef INF
#define INF INFLL
#define stoi stoll
#endif
    cin.tie(0);
    ios::sync_with_stdio(false);
    cout << setprecision(15) << fixed;
  }
} before_main_function;
//------------------------------------------------------------------------------

void solve(int N, int M, int L) {
  struct edge {
    int to;
    int left;
    int dist;
    int thief;
  };
  vector<vector<vector<edge>>> g(N, vector<vector<edge>>(110));
  REP(i, M) {
    int a, b, d, e;
    cin >> a >> b >> d >> e;
    REP(j, 110) {
      g[a - 1][j].push_back(edge{b - 1, j, d, e}); // ????????????
      if (j - d >= 0)
        g[a - 1][j].push_back(edge{b - 1, j - d, d, e}); // ??????
    }
    REP(j, 110) {
      g[b - 1][j].push_back(edge{a - 1, j, d, e}); // ????????????
      if (j - d >= 0)
        g[b - 1][j].push_back(edge{a - 1, j - d, d, e}); // ??????
    }
  }
  vector<vector<int>> dp(N, vector<int>(110, INF));
  dp[0][L] = 0;
  priority_queue<pair<int, pii>, vector<pair<int, pii>>,
                 greater<pair<int, pii>>>
      pq;
  pq.push({0, {0, L}});
  while (!pq.empty()) {
    int y = pq.top().second.first;
    int z = pq.top().second.second;
    pq.pop();
    FORE(e, g[y][z]) {
      if (z == e.left) {
        if (dp[e.to][e.left] > dp[y][z] + e.thief) {
          dp[e.to][e.left] = dp[y][z] + e.thief;
          pq.push({dp[e.to][e.left], {e.to, e.left}});
        }
      } else {
        if (dp[e.to][e.left] > dp[y][z]) {
          dp[e.to][e.left] = dp[y][z];
          pq.push({dp[e.to][e.left], {e.to, e.left}});
        }
      }
    }
  }
  int ans = INF;
  REP(i, 110) chmin(ans, dp[N - 1][i]);
  cout << ans << endl;
}
signed main() {
  while (1) {
    int N, M, L;
    cin >> N >> M >> L;
    if (N + M + L == 0)
      break;
    solve(N, M, L);
  }
  return 0;
}