Submission #472425

#	Time	Username	Problem	Language	Result	Execution time	Memory
472425		yasseenkamel	Railway (BOI17_railway)	C++14	0 / 100	119 ms	1828 KiB

railway

#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")
#pragma GCC optimize("-Ofast")
#include <bits/stdc++.h>

using namespace std;

typedef int in;
#define int long long
#define s second
#define f first
const long double EPS=1e-9;
const int MOD=1e9+7;
const int N=1e6;

int n,m,k;
int f[100005];

in main(){
	cin >> n >> m >> k;
	for(int i = 0 ; i < n - 1 ; i ++){
        int x,y;
        cin >> x >> y;
	}
	for(int i = 0 ; i < m ; i ++){
        int x;
        cin >> x;
        for(int j = 0 ; j < x ; j ++){
            int y;
            cin >> y;
            f[y] ++;
        }
	}
	vector<int> v;
	for(int i = 1 ; i <= n ; i ++){
        if(f[i] >= k){
            v.push_back(i);
        }
	}
	cout << v.size() << endl;
	for(int i = 0 ; i < v.size() ; i ++){
        cout << v[i] << " ";
	}
    return 0;
}

Compilation message (stderr)

railway.cpp: In function 'in main()':
railway.cpp:41:20: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |  for(int i = 0 ; i < v.size() ; i ++){
      |                  ~~^~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 15
• Subtask 3: 0 / 7
• Subtask 4: 0 / 29
• Subtask 5: 0 / 16
• Subtask 6: 0 / 25