oj.uz

Submission #704868

# Submission time Handle Problem Language Result Execution time Memory
704868 2023-03-03T06:10:24 Z Paul_Liao_1457 Naboj (COCI22_naboj) C++17
25 / 110
 344 ms 524288 KB 
//記得跳題
//#pragma GCC optimize("O4,unroll_loops")
//#pragma GCC target("avx2")
#include<iostream>
#include<array>
#include<vector>
#include<string>
#include<algorithm>
#include<set>
#include<queue>
#include<stack>
#include<math.h>
#include<map>
#include<unordered_map>
#include<unordered_set>
#include<cstring>
#include<iomanip>
#include<bitset>
#include<tuple>
#include<random>

#define ll long long
#define FOR(i,a,b) for(int i=a;i<b;i++)
#define pb push_back
#define INF (ll)(2e18)
#define F first
#define S second
#define endl "\n"
#define AC ios::sync_with_stdio(0);

using namespace std;

vector<pair<int, int> > e[200005];
vector<pair<int, int> > ans;

void dfs(int now, int f,int up){
  if (up != -1) {
    ans.pb({now, up});
  }
  for (auto i:e[now]) if (i.F != f) {
    dfs(i.F, now, i.S);
  }
}

signed main(){
  AC;
  int n, m; cin >> n >> m;
  FOR (i, 0, m) {
    int a, b; cin >> a >> b;
    e[a].pb({b, 0});
    e[b].pb({a, 1});
  }
  dfs(1, 0, -1);
  cout << ans.size() << endl;
  for (auto i:ans) {
    cout << i.F << " " << i.S << endl;
  }
}

Subtask #1
0 / 15.0

# Verdict Execution time Memory Grader output
1 Runtime error 344 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 148 ms 16076 KB Output is correct
2 Correct 137 ms 16764 KB Output is correct
3 Correct 66 ms 11548 KB Output is correct
4 Correct 141 ms 16712 KB Output is correct
5 Correct 141 ms 16840 KB Output is correct
6 Correct 214 ms 16780 KB Output is correct
7 Correct 140 ms 16776 KB Output is correct
8 Correct 130 ms 14364 KB Output is correct
9 Correct 138 ms 16860 KB Output is correct
10 Correct 149 ms 16772 KB Output is correct

Subtask #3
0 / 70.0

# Verdict Execution time Memory Grader output
1 Runtime error 344 ms 524288 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -