oj.uz

Submission #472458

# Submission time Handle Problem Language Result Execution time Memory
472458 2021-09-13T15:37:13 Z yasseenkamel Railway (BOI17_railway) C++14
8 / 100
 1000 ms 32980 KB 
#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;
vector<int> adj[100005];
map<pair<int,int>,int> ed;
bool b = 0;
int f[100005];
bool vis[100006],tar[100005];

int dfs(int node,int par){
    vis[node] = 1;
    int ret = 0;
    if(tar[node]){
        ret = 1;
    }
    for(int i = 0 ; i < adj[node].size() ; i ++){
        int f1 = adj[node][i];
        if(f1 == par){
            continue;
        }
        int ans = dfs(f1,node);
        f[ed[{node,f1}]] += ans;
        ret = max(ret,ans);
    }
    return ret;
}

in main(){
	cin >> n >> m >> k;
	for(int i = 0 ; i < n - 1 ; i ++){
        int x,y;
        cin >> x >> y;
        adj[x].push_back(y);
        adj[y].push_back(x);
        ed[{x,y}] = i + 1;
        ed[{y,x}] = i + 1;
	}
	for(int i = 0 ; i < m ; i ++){
        int x,y;
        cin >> x >> y;
        memset(tar,0,sizeof tar);
        for(int j = 1 ; j < x ; j ++){
            int z;
            cin >> z;
            tar[z] = 1;
        }
        dfs(y,-1);
	}
	vector<int> v;
	for(int i = 1 ; i <= n ; i ++){
        //cout << f[i] << endl;
        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

railway.cpp: In function 'long long int dfs(long long int, long long int)':
railway.cpp:29:23: 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]
   29 |     for(int i = 0 ; i < adj[node].size() ; i ++){
      |                     ~~^~~~~~~~~~~~~~~~~~
railway.cpp: In function 'in main()':
railway.cpp:70:20: 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]
   70 |  for(int i = 0 ; i < v.size() ; i ++){
      |                  ~~^~~~~~~~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 390 ms 4612 KB Output is correct
3 Correct 382 ms 4556 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 560 ms 5300 KB Output is correct
7 Correct 181 ms 4676 KB Output is correct
8 Correct 733 ms 4560 KB Output is correct
9 Correct 862 ms 4676 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 2 ms 2636 KB Output is correct
12 Correct 2 ms 2636 KB Output is correct
13 Correct 2 ms 2636 KB Output is correct
14 Correct 2 ms 2636 KB Output is correct

Subtask #2
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 390 ms 4612 KB Output is correct
3 Correct 382 ms 4556 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 560 ms 5300 KB Output is correct
7 Correct 181 ms 4676 KB Output is correct
8 Correct 733 ms 4560 KB Output is correct
9 Correct 862 ms 4676 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 2 ms 2636 KB Output is correct
12 Correct 2 ms 2636 KB Output is correct
13 Correct 2 ms 2636 KB Output is correct
14 Correct 2 ms 2636 KB Output is correct
15 Execution timed out 1094 ms 4696 KB Time limit exceeded
16 Halted 0 ms 0 KB -

Subtask #3
0 / 7.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1093 ms 32980 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 29.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1091 ms 27412 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 16.0

# Verdict Execution time Memory Grader output
1 Execution timed out 1091 ms 27412 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #6
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 390 ms 4612 KB Output is correct
3 Correct 382 ms 4556 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 560 ms 5300 KB Output is correct
7 Correct 181 ms 4676 KB Output is correct
8 Correct 733 ms 4560 KB Output is correct
9 Correct 862 ms 4676 KB Output is correct
10 Correct 2 ms 2636 KB Output is correct
11 Correct 2 ms 2636 KB Output is correct
12 Correct 2 ms 2636 KB Output is correct
13 Correct 2 ms 2636 KB Output is correct
14 Correct 2 ms 2636 KB Output is correct
15 Execution timed out 1094 ms 4696 KB Time limit exceeded
16 Halted 0 ms 0 KB -