Submission #1012297

#	Time	Username	Problem	Language	Result	Execution time	Memory
1012297		codefox	Robot (JOI21_ho_t4)	C++14	0 / 100	295 ms	54116 KiB

Main

    #include<bits/stdc++.h>
     
    using namespace std;
     
    #pragma GCC optimize("Ofast")
    #pragma GCC target("avx,avx2,fma")
     
    #define int long long
    #define arr array<int, 5>
    #define pii pair<int, int>
     
    vector<vector<arr>> graph;
     
    int lim = 1e18;
     
    int32_t main()
    {
        //freopen("input.txt", "r", stdin);
        //freopen("output.txt", "w", stdout);
        
        ios_base::sync_with_stdio(false);
        cin.tie(0);
        cout.tie(0);
     
        int n, m;
        cin >> n >> m;
     
        graph.assign(n, vector<arr>());
        vector<map<int, int>> cost(n);
        vector<map<int, int>> dist(n);
        vector<map<int, vector<pii>>> colour(n);
        vector<int> mn(n, lim);
     
        for (int j = 0; j < m; j++)
        {
            int a, b, c, d;
            cin >> a >> b >> c >> d;
            a--; b--; 
            graph[a].push_back({b, c, d, 0, 0});
            graph[b].push_back({a, c, d, 0, 0});
        }
     
        for (int i = 0; i < n; i++)
        {
            for (arr ele:graph[i])
            {
                cost[i][ele[1]] += ele[2];
                dist[ele[0]][ele[1]] = lim;
                colour[i][ele[1]].push_back({ele[0], ele[2]});
            }
            dist[i][0] = lim;
        }
     
        priority_queue<arr, vector<arr>, greater<arr>> pq;
     
        pq.push({0, 0, 0, 0, 0});
        while (pq.size())
        {
            arr a = pq.top();
            pq.pop();
            int d = a[0];
            int c = a[1];
            int i = a[2];
            int cc = a[4];
            int pc = a[3];
     
            if (dist[i][c]<=d) continue;
            dist[i][c] = d;
     
            if (c==0)
            {
                for (arr ele:graph[i])
                {
                    pq.push({d+cost[i][ele[1]]-ele[2], 0, ele[0], ele[1], ele[2]});
                    pq.push({d, ele[1], ele[0], 0, 0});
                    pq.push({d+ele[2], 0, ele[0], ele[1], ele[2]});
                }
            }
            else
            {
                for (pii ele:colour[i][pc])
                {
                    pq.push({d+cost[i][pc]-ele.second, 0, ele.first, -1, -1});
                }
            }
        }
        if (mn[n-1]>=lim) cout << -1;
        else cout << mn[n-1];
        return 0;
    }

Compilation message (stderr)

Main.cpp: In function 'int32_t main()':
Main.cpp:64:17: warning: unused variable 'cc' [-Wunused-variable]
   64 |             int cc = a[4];
      |                 ^~

• Subtask 1: 0 / 34
• Subtask 2: 0 / 24
• Subtask 3: 0 / 42