Submission #1268518

#	Time	Username	Problem	Language	Result	Execution time	Memory
1268518		m_mondzik	Crocodile's Underground City (IOI11_crocodile)	C++20	46 / 100	2 ms	584 KiB

crocodile

#include "crocodile.h"
#include<bits/stdc++.h>
#define F first 
#define S second 
using namespace std;

int travel_plan(int N, int M, int R[][2], int L[], int K, int P[]){
    vector<pair<int, int>> graph[N];
    for (int i = 0; i < M; i++) {
        graph[R[i][0]].push_back({R[i][1], L[i]});
        graph[R[i][1]].push_back({R[i][0], L[i]});
    }
    const int lim = 1e18 + 1;
    priority_queue<pair<long long, int>, vector<pair<long long, int>>, greater<pair<long long, int>>> Q;
    vector<int> degree(N, {0});
    vector<pair<long long, long long>> mini(N, {lim, lim});
    for (int i = 0; i < K; i++){
        degree[P[i]] = 2;
        Q.push({0, P[i]});
        mini[P[i]] = {0, 0};
    }
    while (!Q.empty()){
        pair<long long, int> v = Q.top();
        Q.pop();
        for (auto i: graph[v.S]){
            degree[i.F]++;
            if (mini[v.S].S + i.S < mini[i.F].F) mini[i.F].S = mini[i.F].F, mini[i.F].F = mini[v.S].S + i.S;
            else if (mini[v.S].S + i.S < mini[i.F].S) mini[i.F].S = mini[v.S].S + i.S;
            if (degree[i.F] == 2 && mini[i.F].S <= 1e9) Q.push({mini[i.F].S, i.F});
        }
    }
    return (int)mini[0].S;
}

Compilation message (stderr)

crocodile.cpp: In function 'int travel_plan(int, int, int (*)[2], int*, int, int*)':
crocodile.cpp:13:26: warning: overflow in conversion from 'double' to 'int' changes value from '1.0e+18' to '2147483647' [-Woverflow]
   13 |     const int lim = 1e18 + 1;
      |                     ~~~~~^~~

• Subtask 1: 46 / 46
• Subtask 2: 0 / 43
• Subtask 3: 0 / 11