Submission #1282779

#	Time	Username	Problem	Language	Result	Execution time	Memory
1282779		herominhsteve	Bosses (BOI16_bosses)	C++20	100 / 100	376 ms	868 KiB

bosses

#include <bits/stdc++.h>
#define el '\n'
#define FNAME "EMPLOYEE"
#define allof(x) x.begin(),x.end()
#define allof1(x) x.begin()+1,x.end()
#define mset(x,n) memset(x,(n),sizeof(x))
using namespace std;
const long long MOD = (long long) 1e9 + 7;
template<class X,class Y> bool minimize(X &a,Y b){ if (a>b) {a=b; return true;} return false;}
template<class X,class Y> bool maximize(X &a,Y b){ if (a<b) {a=b; return true;} return false;}

void setup(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
	if (fopen(FNAME".inp","r")){
		freopen(FNAME".inp","r",stdin);
		freopen(FNAME".out","w",stdout);
	}
}

const int MAXN = 5005;
const int INF = 1e9 + 15092007;

int n;
vector<int> graph[MAXN];

void init(){
	cin>>n;
    for (int u=1;u<=n;u++){
        int k; cin>>k;
        while (k--){
            int p; cin>>p;
            graph[p].push_back(u);
        }
    }
}

long long bfs(int s){
    vector<int> distancia(n+1,INF);
    distancia[s] = 1;
    queue<int> qu;
    qu.push(s);
    while (!qu.empty()){
        int u = qu.front(); qu.pop();
        for (int v : graph[u]){
            if (minimize(distancia[v],distancia[u] + 1)){
                qu.push(v);
            }
        }
    }
    long long res = 0;
    for (int i=1;i<=n;i++) res += distancia[i];
    return res;
}

void sol(){
	long long res = (long long) 1e16 + 15092007;
    for (int u=1;u<=n;u++)
        minimize(res,bfs(u));
    cout<<res;
}

int main(){
    setup();
    init();
    sol();
}

Compilation message (stderr)

bosses.cpp: In function 'void setup()':
bosses.cpp:16:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |                 freopen(FNAME".inp","r",stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
bosses.cpp:17:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |                 freopen(FNAME".out","w",stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

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