Submission #1178246

#	Time	Username	Problem	Language	Result	Execution time	Memory
1178246		InvMOD	Crocodile's Underground City (IOI11_crocodile)	C++20	Compilation error	0 ms	0 KiB

crocodile

#include<bits/stdc++.h>

using namespace std;

#define name "InvMOD"
#ifndef name
    #include "crocodile.h"
#endif // name

#define sz(v) (int)(v).size()


int travel_plan(int n, int m, int R[][2], int L[], int K, int P[]){
    vector<vector<pair<int,int>>> adj(n, vector<pair<int,int>>());

    for(int i = 0; i < m; i++){
        int u = R[i][0], v = R[i][1];
        adj[u].emplace_back(v, L[i]);
        adj[v].emplace_back(u, L[i]);
    }

    const int inf = 1e9;
    vector<vector<int>> dist(n, vector<int>(2, inf));
    for(int i = 0; i < K; i++){
        int x = P[i];
        dist[x][0] = 0;
        dist[x][1] = 0;
    }

    priority_queue<pair<int, int>> pq;
    for(int i = 0; i < K; i++) pq.push({0, P[i]});

    while(!pq.empty()){
        pair<int,int> eq = pq.top(); pq.pop();

        int cur_dist = -eq.first, x = eq.second;
        if(cur_dist == inf || cur_dist > dist[x][1]) continue;

        for(pair<int,int> e : adj[x]){
            int v = e.first, w = e.second;

            if(cur_dist + w < dist[v][0]){
                dist[v][1] = dist[v][0];
                dist[v][0] = cur_dist + w;

                pq.push({-dist[v][1], v}); // bro forget dijkstra lol
            }
            else if(cur_dist + w < dist[v][1]){
                dist[v][1] = cur_dist + w;

                pq.push({-dist[v][1], v});
            }
        }
    }

    return dist[0][1];
}

#ifdef name
    int32_t main(){
        freopen(name".INP", "r", stdin);
        freopen(name".OUT", "w", stdout);

        int n,m,k; cin >> n >> m >> k;

        int E[m][2], L[m], P[k];
        for(int i = 0; i < m; i++){
            cin >> E[i][0] >> E[i][1] >> L[i];
        }

        for(int i = 0; i < k; i++){
            cin >> P[i];
        }

        cout << travel_plan(n, m, E, L, k, P) << "\n";
        return 0;
    }

#endif // name

Compilation message (stderr)

crocodile.cpp: In function 'int32_t main()':
crocodile.cpp:61:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   61 |         freopen(name".INP", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
crocodile.cpp:62:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   62 |         freopen(name".OUT", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
/usr/bin/ld: /tmp/ccHnhRMI.o: in function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccY6UrDE.o:crocodile.cpp:(.text.startup+0x0): first defined here
collect2: error: ld returned 1 exit status