제출 #975561

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
975561		moai	Bosses (BOI16_bosses)	C++17	100 / 100	490 ms	852 KiB

bosses

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#include <iostream>
#include<vector>
#include <queue>

using namespace std;

long long bfs(int v, vector<vector<int>> &g) {
    queue<int> q;
    q.push(v);
    int n = g.size();
    vector<long long> deep(n, 1e10);
    deep[v] = 1;
    while (q.size() > 0) {
        int u = q.front();
        q.pop();
        for (int i = 0; i < g[u].size(); ++i) {
            if (deep[g[u][i]] > 1000000) {
                deep[g[u][i]] = deep[u] + 1;
                q.push(g[u][i]);
            }
        }
    }
    long long summ = 0;
    for(int i = 0; i < n; ++i) {
        summ += deep[i];
    }
    return summ;
}

int main()
{
    int n;
    cin >> n;
    vector<vector<int>> g(n);
    for (int i = 0; i < n; ++i) {
        int k;
        cin >> k;
        for (int j = 0; j < k; ++j) {
            int v;
            cin >> v;
            --v;
            g[v].push_back(i);
        }
    }
    long long total_cost = 1000000000000;
    for (int i = 0; i < n; ++i) {
        long long ans = bfs(i, g);
        if(ans < total_cost) {
            total_cost = ans;
        }
    }
    cout << total_cost;
    return 0;
}

컴파일 시 표준 에러 (stderr) 메시지

bosses.cpp: In function 'long long int bfs(int, std::vector<std::vector<int> >&)':
bosses.cpp:24:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |         for (int i = 0; i < g[u].size(); ++i) {
      |                         ~~^~~~~~~~~~~~~

• Subtask 1: 22 / 22
• Subtask 2: 45 / 45
• Subtask 3: 33 / 33