Submission #42381

#	Time	Username	Problem	Language	Result	Execution time	Memory
42381		Hassoony	Bosses (BOI16_bosses)	C++11	67 / 100	1550 ms	1216 KiB

bosses

#include<bits/stdc++.h>
#include<unordered_map>
#define F first
#define S second
using namespace std;
typedef long long ll;
typedef long double D;
const ll inf=(1ll<<61);
const ll mod=1e9+7;
const int MX=5002;
int n,k,x;
bool vis[MX];
int val[MX];
vector<short int>v[MX],v1[MX];
int ans,mn=1e9;
void dfs(short int x){
    if(v1[x].size()==0){
        val[x]=1;
        ans++;
        vis[x]=1;
        return;
    }
    if(vis[x])return;
    vis[x]=1;
    int &ret=val[x];
    for(auto pp:v1[x]){
        if(vis[pp])continue;
        dfs(pp);
        ret+=val[pp];
    }
    ++ret;
    ans+=ret;
}
int main(){
    scanf("%d",&n);
    for(int i=1;i<=n;i++){
        scanf("%d",&k);
        while(k--){
            scanf("%d",&x);
            v[x].push_back(i);
        }
    }
    for(short int i=1;i<=n;i++){
        for(short int j=1;j<=n;j++)v1[j].clear(),vis[j]=0,val[j]=0;
        ans=0;
        queue<short int>q;
        q.push(i);
        while(!q.empty()){
            short int x=q.front();q.pop();
            vis[x]=1;
            for(auto pp:v[x]){
                if(vis[pp])continue;
                v1[x].push_back(pp);
                vis[pp]=1;
                q.push(pp);
            }
        }
        bool b=1;
        for(int j=1;j<=n;j++){
            if(!vis[j])b=0;
        }
        if(!b)continue;
        for(short int j=1;j<=n;j++)vis[j]=0;
        dfs(i);
        b=1;
        if(b)mn=min(mn,ans);
    }
    printf("%d\n",mn);
}

Compilation message (stderr)

bosses.cpp: In function 'int main()':
bosses.cpp:35:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d",&n);
                   ^
bosses.cpp:37:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",&k);
                       ^
bosses.cpp:39:27: 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: 0 / 33