Submission #584991

#	Time	Username	Problem	Language	Result	Execution time	Memory
584991		ktkerem	Bosses (BOI16_bosses)	C++17	100 / 100	762 ms	832 KiB

bosses

/*#pragma GCC target ("avx2")
#pragma GCC optimize ("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")*/
#include<bits/stdc++.h>
#include <cstdlib>
/*#include <bits/extc++.h>
using namespace std;
using namespace __gnu_pbds;
template<class T>
using oset = tree<T, null_type, less_equal<T>, rb_tree_tag, tree_order_statistics_node_update>;
/**/
//typedef int ll;
typedef long long ll;
typedef unsigned long long ull;
typedef __int128 vll;
typedef unsigned __int128 uvll;
ll _i=0;
#define ffn(x) _i=x
#define llll std::pair<ll , ll>
#define stitr set<ll>::iterator
#define fora(y,x) for(ll y=_i;x>y;y++)
#define pb push_back
#define pf push_front
#define halo cout << "hello\n"
#define fi first
#define sec second
#define all(a) a.begin() , a.end()
const ll limit = 1e18 + 7; 
const ll ous = 5007;
const ll dx[4] = {1 , 0 , 0 , -1} , dy[4] = {0,1,-1,0};
std::vector<ll> adj[ous];
ll s = 0 , n;
ll vis[ous];
ll bfstest(ll x){
    memset(vis , 0 , sizeof(vis));
    s = 0;
    ll sum = 0;
    std::queue<llll> qu;
    qu.push({x , 1});
    vis[x] = 1;
    while(!qu.empty()){
        llll a = qu.front();
        //std::cout << a.fi << " " << a.sec << "\n";
        qu.pop();
        sum+=a.sec;
        s++;
        for(auto j:adj[a.fi]){
            if(vis[j] == 0){
                vis[j] = 1;
                qu.push({j , a.sec + 1});
            }
        }
    }
    if(s == n){
        return sum;
    }
    return -1;
}
void solve(){
    std::cin >> n;
    for(ll i = 1;n>=i;i++){
        ll k;std::cin >> k;
        fora(j , k){
            ll x;std::cin >> x;
            adj[x].pb(i);
        }
    }
    ll rt = limit;
    fora(i , n){
        ll s = bfstest(i + 1);
        rt = std::min(rt , (s == -1 ? limit :s));
        //std::cout << s << " " << i+1 << "\n";
    }
    if(rt == limit){
        rt = -1;
    }
    std::cout << rt << "\n";
    return;/**/
}
signed main(){
    std::ios_base::sync_with_stdio(false);std::cin.tie(NULL);
    ll t=1;
    //std::cin >> t;
    ll o = 1;
    while(t--){ 
        //cout << "Case " << o++ << ":\n";
        solve();
    }
    return 0; 
}

Compilation message (stderr)

bosses.cpp:13:1: warning: "/*" within comment [-Wcomment]
   13 | /**/
      |  
bosses.cpp: In function 'int main()':
bosses.cpp:86:8: warning: unused variable 'o' [-Wunused-variable]
   86 |     ll o = 1;
      |        ^

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