Submission #735642

#	Time	Username	Problem	Language	Result	Execution time	Memory
735642		MODDI	Bosses (BOI16_bosses)	C++14	100 / 100	634 ms	764 KiB

bosses

#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define mp make_pair
typedef long long ll;
typedef pair<long long, long long> pll;
typedef pair<int,int> pii;
typedef vector<long long> vl;
typedef vector<int> vi;
int n;
vi G[5100];
vector<pii> ord;
ll rez = 0, all = 0;
bool vis[5100];
void bfs(int v, int br)
{
    if(vis[v] and br!=ord.size()){bfs(ord[br].first, br+1); return;}
    else if(vis[v] and br==ord.size())return;
    vis[v]=true;
    all++;
    if(br==0)rez+=1;
    else rez+=ord[br-1].second;
    for(auto next : G[v])
    {
        if(!vis[next] and br!=0){ord.push_back({next, ord[br-1].second+1});}
        else if (!vis[next] and br==0)ord.push_back({next, 2});
    }
    if(br==ord.size())return;
 
    bfs(ord[br].first, br+1);
}
int main(){
	cin>>n;
	for(int i = 0; i < n; i++){
		int k;
		cin>>k;
		for(int j = 0; j < k; j++){
			int a;
			cin>>a;
			a--;
			G[a].pb(i);
		}
	}
	ll ans = 1e9;
	for(int i = 0; i < n; i++){
		rez = 0;
		all = 0;
		memset(vis, false, sizeof vis);
		ord.clear();
		bfs(i, 0);
//		cout<<rez<<endl;
		if(all==n)	ans = min(ans, rez);
	}
	cout<<ans<<endl;
	return 0;
}

Compilation message (stderr)

bosses.cpp: In function 'void bfs(int, int)':
bosses.cpp:17:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   17 |     if(vis[v] and br!=ord.size()){bfs(ord[br].first, br+1); return;}
      |                   ~~^~~~~~~~~~~~
bosses.cpp:18:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |     else if(vis[v] and br==ord.size())return;
      |                        ~~^~~~~~~~~~~~
bosses.cpp:28:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |     if(br==ord.size())return;
      |        ~~^~~~~~~~~~~~

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