Submission #99566

#	Time	Username	Problem	Language	Result	Execution time	Memory
99566		tushar_2658	Bosses (BOI16_bosses)	C++14	100 / 100	569 ms	732 KiB

bosses

#include "bits/stdc++.h"
using namespace std;

int dis[5005];
int n;
vector<int> edges[5005];

int bfs(int s){
    memset(dis, -1, sizeof dis);
    dis[s] = 1;
    queue<int> que;
    que.push(s);
    while(!que.empty()){
        s = que.front();
        que.pop();
        for(auto i : edges[s]){
            if(dis[i] != -1)continue;
            dis[i] = dis[s] + 1;
            que.push(i);
        }
    }
    int ret = 0;
    for(int i=1; i<=n; i++){
        if(dis[i] == -1)return -1;
        ret += dis[i];
    }return ret;
}

int main(){
    scanf("%d", &n);
    for(int i=1; i<=n; i++){
        int timer;
        scanf("%d", &timer);
        while(timer--){
            int x;
            scanf("%d", &x);
            edges[x].emplace_back(i);
        }
    }
    int ans = INT_MAX;
    for(int i=1; i<=n; i++){
        int x = bfs(i);
        if(x == -1)continue;
        ans = min(ans, x);
    }cout<<ans<<endl;
}

Compilation message (stderr)

bosses.cpp: In function 'int main()':
bosses.cpp:30:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
     ~~~~~^~~~~~~~~~
bosses.cpp:33:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &timer);
         ~~~~~^~~~~~~~~~~~~~
bosses.cpp:36:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &x);
             ~~~~~^~~~~~~~~~

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