Submission #1102557

#	Time	Username	Problem	Language	Result	Execution time	Memory
1102557		vjudge1	Travelling Merchant (CCO21_day2problem1)	C++17	25 / 25	135 ms	24512 KiB

Main

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

#define int long long
#define pii pair <int, int>
#define fi first
#define se second
#define mp make_pair

const int NM = 2e5, inf = 1e18;

int N, M, u[NM+5], v[NM+5], r[NM+5], p[NM+5], od[NM+5];
vector <int> g[NM+5];
int deg[NM+5];
stack <int> st;
bool del[NM+5];
priority_queue <pair <pii, pii> > pq;
int ans[NM+5];

signed main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    cin >> N >> M;
    for (int i = 1; i <= M; i++){
        cin >> u[i] >> v[i] >> r[i] >> p[i];
        g[v[i]].push_back(i);
        deg[u[i]]++;
        od[i] = i;
    }
    sort(od+1, od+1+M, [&](int i, int j){
        return r[i] > r[j];
    });
    for (int i = 1; i <= N; i++)
        if (!deg[i]) st.push(i);
    while (!st.empty()){
        int x = st.top(); st.pop();
        for (int i : g[x]){
            del[i] = 1;
            deg[u[i]]--;
            if (!deg[u[i]]) st.push(u[i]);
        }
    }
    for (int i = 1; i <= N; i++)
        ans[i] = +inf;
    for (int t = 1; t <= M; t++){
        int i = od[t];
        if (del[i]) continue;
        del[i] = 1;
        ans[u[i]] = min(ans[u[i]], r[i]);
        deg[u[i]]--;
        if (deg[u[i]]) continue;
        st.push(u[i]);
        while (!st.empty()){
            int x = st.top(); st.pop();
            for (int i : g[x]){
                if (del[i]) continue;
                del[i] = 1;
                ans[u[i]] = min(ans[u[i]], max(ans[v[i]]-p[i], r[i]));
                deg[u[i]]--;
                if (!deg[u[i]]) st.push(u[i]);
            }
        }
    }
    for (int i = 1; i <= N; i++)
        cout << (ans[i] == +inf ? -1 : ans[i]) << ' ';
    return 0;
}

• Subtask 1: 4 / 4
• Subtask 2: 5 / 5
• Subtask 3: 16 / 16