Submission #91976

#	Time	Username	Problem	Language	Result	Execution time	Memory
91976		Kamisama	Bosses (BOI16_bosses)	C++14	100 / 100	1496 ms	732 KiB

bosses

#include <iostream>
#include <cstdio>
#include <vector>
using namespace std;
const int maxn=5e3+7;
int n,h[maxn],res;
vector<int> adj[maxn];
struct Queue{
    struct Node{
        int val;
        Node *link;
    }*head,*tail;
    Queue():head{nullptr},tail{nullptr}{};
    inline bool Empty(){
        return head==nullptr;
    }
    inline void Push(const int &val){
        Node *newTail=new Node;
        newTail->val=val;
        newTail->link=nullptr;
        if(tail) tail->link=newTail;
        tail=newTail;
        if(!head) head=tail;
    }
    inline int Pop(){
        if(Empty()) return -1;
        Node *ptr=head;
        head=ptr->link;
        if(!head) tail=nullptr;
        int val=ptr->val;
        delete ptr;
        return val;
    }
};
inline void Bfs(const int &root){
    Queue q;
    fill(h,h+n+1,0);
    h[root]=1;
    int sum=1,nEdges=0;
    q.Push(root);
    while(!q.Empty()){
        int u=q.Pop();
        for(int v: adj[u]){
            if(h[v]) continue;
            nEdges++;
            h[v]=h[u]+1;
            sum+=h[v];
            q.Push(v);
        }
    }
    if(nEdges==n-1) res=min(res,sum);
}
inline void Read(int &x){
    register char c;
    for(c=getchar();c>'9'||c<'0';c=getchar());
    for(x=0;'0'<=c&&c<='9';c=getchar()) x=10*x+c-'0';
}
inline void Write(const int &x){
    if(x>9) Write(x/10);
    putchar(x%10+'0');
}
int main(){
    Read(n);
    for(int i=1,k=0;i<=n;i++){
        Read(k);
        for(int j=1,x=0;j<=k;j++) Read(x), adj[x].push_back(i);
    }
    res=(int)1e9+7;
    for(int i=1;i<=n;i++) Bfs(i);
    Write(res);
    return 0;
}

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