제출 #639929

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
639929		Stavab	Crocodile's Underground City (IOI11_crocodile)	C++14	46 / 100	2 ms	468 KiB

crocodile

#include "crocodile.h"
#include <vector>
#include <utility>

using namespace std;

#define INF 9999999999

vector<vector<pair<int, int>>> tree;
vector<long long> times;
vector<int> visited;

void dfs(int n)
{
    if(visited[n])
        return;
    else
        visited[n] = 1;
        
    if(times[n] == 0)
        return;
        
    vector<long long> temp;
    for(int i = 0; i < tree[n].size(); i++)
    {
        dfs(tree[n][i].first);
        
        temp.push_back(times[tree[n][i].first] + tree[n][i].second);
    }
    
    long long minInd, curMin = INF;
    for(int i = 0; i < temp.size(); i++)
    {
        if(curMin > temp[i])
        {
            curMin = temp[i];
            minInd = i;
        }
    }
    curMin = INF;
    for(int i = 0; i < temp.size(); i++)
    {
        if(curMin > temp[i] && i != minInd)
            curMin = temp[i];
    }
    
    if(curMin >= INF)
        times[n] = INF;
    else
        times[n] = curMin;
}

int travel_plan(int N, int M, int R[][2], int L[], int K, int P[])
{
    tree.assign(N, vector<pair<int, int>>());
    times.assign(N, INF);
    visited.assign(N, 0);
    
    for(int i = 0; i < N - 1; i++)
    {
        tree[R[i][0]].push_back(make_pair(R[i][1], L[i]));
        tree[R[i][1]].push_back(make_pair(R[i][0], L[i]));
    }
        
    for(int i = 0; i < K; i++)
        times[P[i]] = 0;
        
    dfs(0);
        
    return (int)times[0];
}

컴파일 시 표준 에러 (stderr) 메시지

crocodile.cpp: In function 'void dfs(int)':
crocodile.cpp:24:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for(int i = 0; i < tree[n].size(); i++)
      |                    ~~^~~~~~~~~~~~~~~~
crocodile.cpp:32:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for(int i = 0; i < temp.size(); i++)
      |                    ~~^~~~~~~~~~~~~
crocodile.cpp:41:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |     for(int i = 0; i < temp.size(); i++)
      |                    ~~^~~~~~~~~~~~~
crocodile.cpp:43:29: warning: 'minInd' may be used uninitialized in this function [-Wmaybe-uninitialized]
   43 |         if(curMin > temp[i] && i != minInd)
      |            ~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~

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