제출 #497848

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
497848		aSSSd	Bosses (BOI16_bosses)	C++14	100 / 100	650 ms	716 KiB

bosses

//#pragma GCC optimize("O2,unroll-loops")
//#pragma GCC target("avx,avx2")
#include <bits/stdc++.h>
using namespace std;
#define in ({int x=0;int c=getchar(),n=0;for(;!isdigit(c);c=getchar()) n=(c=='-');for(;isdigit(c);c=getchar()) x=x*10+c-'0';n?-x:x;})
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int rnd(int l,int r)
{
    return l+rng()%(r-l+1);
}
#define fasty ios_base::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define forinc(x,a,b) for(int x=a;x<=b;x++)
#define fordec(x,a,b) for(int x=a;x>=b;x--)
#define forv(a,b) for(auto&a:b)
#define fi first
#define se second
#define pb push_back
#define ii pair<long long,long long>
#define getbit(x,i) ((x>>(i))&1)
#define batbit(x,i) (x|(1ll<<(i)))
#define tatbit(x,i) (x&~(1<<(i)))
#define gg exit(0);
#define all(a) a.begin() , a.end()
#define int long long
const int N = 5010;
int n;
vector<int> ke[N];
//f[x] = sum(f[v]) +1;
int dd[N];

int F(int x)
{
    int ret=0;
    memset(dd, 0 , sizeof dd);
    queue<int> q;
    dd[x] = 1;
    q.push(x);
    while(!q.empty())
    {
        int u = q.front();
        q.pop();
        ret+=dd[u];
        for(auto v : ke[u])
        {
            if(dd[v]) continue;
            dd[v] = dd[u] + 1;
            q.push(v);
        }
    }
    forinc(i,1,n) if(!dd[i]) ret = 1e15;
    return ret;
}


main()
{
    fasty;
    cin >> n;
    forinc(i,1,n)
    {
        int num;
        cin >> num;
        while(num--)
        {
            int x;
            cin >> x;
            ke[x].pb(i);
        }
    }
    int res = 1e15;
    forinc(i,1,n)
    {
        res = min(res , F(i));
    }
    cout << res;
}

컴파일 시 표준 에러 (stderr) 메시지

bosses.cpp:55:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   55 | main()
      | ^~~~

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