Submission #3609341

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;

#define rep(i, j, n) for(int i=j;i<n;++i)
#define all(i) i.begin(),i.end()
#define rall(i) i.rbegin(),i.rend()
#define INF 1e9
const int mod = 1e9 + 7;

typedef long long i64;
typedef pair<int, int> pi;

template <class T> using vt = vector<T>;
template <class T> using vvt = vector<vector<T>>;

i64 gcd(i64 n, i64 m) {return (m == 0? n : gcd(m, n % m));}
i64 lcm(i64 n, i64 m) {return (n / gcd(n, m) * m);}
int dx[] = {0, 1, 0, -1};
int dy[] = {1, 0, -1, 0};

vvt<pair<int, int>> edge;

void dijkstra(int s, vt<i64> &cost, vt<i64> &dist) {
  priority_queue<pair<int, i64>, vt<pair<int, i64>>, greater<pair<int, i64>>> que;
  que.push({s, 0});

  while(!que.empty()) {
    int v = que.top().first;
    i64 d = que.top().second;
    que.pop();

    if(dist[v] < d) continue;
    dist[v] = d;

    for(auto &nxt : edge[v]) {
      que.push({nxt.first, dist[v] + cost[nxt.second]});
    }
  }
}

int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);

  int n, m, s, t;
  cin >> n >> m >> s >> t;
  s--; t--;

  vt<i64> a(m), b(m);
  edge.resize(n);
  rep(i, 0, m) {
    int u, v;
    cin >> u >> v >> a[i] >> b[i];
    u--; v--;
    edge[u].push_back({v, i});
    edge[v].push_back({u, i});
  }

  vt<i64> dist1(n, 1e18), dist2(n, 1e18);
  dijkstra(s, a, dist1);
  dijkstra(t, b, dist2);

  vt<i64> ans;
  i64 res = 0;
  for(int i = n - 1; i >= 0; --i) {
    res = max(res, (i64)1e15 - dist1[i] - dist2[i]);
    ans.push_back(res);
  }

  for(int i = n - 1; i >= 0; --i) cout << ans[i] << endl;
}

Submission Info

Judge Result