Submission #532996

#	Time	Username	Problem	Language	Result	Execution time	Memory
532996		makanhulia	Bosses (BOI16_bosses)	C++17	0 / 100	1 ms	460 KiB

bosses

#include <bits/stdc++.h>
using namespace std;
#define ll long long
int n;
vector<int> adj[5005];
int dist[5005][5005];
bool vis[5005][5005];

int bfs(int x) {
  queue <int> q;
  q.push(x);
  int sum = 1;
  dist[x][x] = 1;
  int mx = 0;
  vis[x][x] = true;
  while(!q.empty()) {
    int cur = q.front();
    q.pop();
    for(int i = 0; i < adj[cur].size(); i++) {
      int next = adj[cur][i];
      if (!vis[next][x]) {
        vis[next][x] = true;
        dist[next][x] = dist[cur][x] + 1;
        sum += dist[next][x];
        mx = max(mx, dist[next][x]);
        q.push(next);
      }
    }
  }
  int ret = (n * (mx + 1)) - sum;
  return ret;
  
}

int main() {
  cin >> n;
  for(int i = 1; i <= n; i++) {
    int k;
    cin >> k;
    for(int j = 0; j < k; j++) {
      int next;
      cin >> next;
      adj[next].push_back(i);
    }
  }
  
  int mn = 1e9;
  for(int i = 1; i <= n; i++) {
    mn = min(mn, bfs(i));
  }
  cout << mn << endl;
  
}

Compilation message (stderr)

bosses.cpp: In function 'int bfs(int)':
bosses.cpp:19:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   19 |     for(int i = 0; i < adj[cur].size(); i++) {
      |                    ~~^~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 22
• Subtask 2: 0 / 45
• Subtask 3: 0 / 33