Submission #563902

#	Time	Username	Problem	Language	Result	Execution time	Memory
563902		Waratpp123	Bosses (BOI16_bosses)	C++14	100 / 100	621 ms	680 KiB

bosses

#include<bits/stdc++.h>
using namespace std;
vector<long long> g[5010];
long long dis[5010];
queue<long long> bfs;
int main(){
    long long n,m,i,j,cnt=0,p,ans=1ll<<60,now;
    scanf("%lld",&n);
    for(i=1;i<=n;i++){
        scanf("%lld",&m);
        while(m--){
            scanf("%lld",&j);
            g[j].push_back(i);
        }
    }
    for(i=1;i<=n;i++){
        while(!bfs.empty()) bfs.pop();
        memset(dis,127,sizeof dis);
        cnt=0;
        p=0;
        dis[i]=1;
        bfs.push(i);
        while(!bfs.empty()){
            now=bfs.front();
            p+=dis[now];
            cnt++;
            bfs.pop();
            for(auto x : g[now]){
                if(dis[x]<=dis[now]+1) continue;
                dis[x]=dis[now]+1;

                bfs.push(x);
            }
        }
        if(cnt!=n) continue;
        ans=min(ans,p);
    }
    printf("%lld",ans);
return 0;
}

Compilation message (stderr)

bosses.cpp: In function 'int main()':
bosses.cpp:8:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    8 |     scanf("%lld",&n);
      |     ~~~~~^~~~~~~~~~~
bosses.cpp:10:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |         scanf("%lld",&m);
      |         ~~~~~^~~~~~~~~~~
bosses.cpp:12:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 |             scanf("%lld",&j);
      |             ~~~~~^~~~~~~~~~~

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