oj.uz

Submission #886737

# Submission time Handle Problem Language Result Execution time Memory
886737 2023-12-12T18:16:50 Z vjudge1 Usmjeri (COCI17_usmjeri) C++17
28 / 140
 155 ms 48068 KB 
#include <bits/stdc++.h>
using namespace std;
#define sp << " " << 
#define int long long
#define vi vector<int>
#define F(xxx,yyy) for (int xxx=1;xxx<=yyy;xxx++)
#define pii pair<int,int>
#define pb push_back
const int N = 5e5+1;
const int inf = 1e9+1;
const int MOD = 1e9+7;

int mult(int x,int y) {return ((x%MOD)*(y%MOD))%MOD;}


void solve() {  
  int n,m;
  cin >> n >> m;
  vi edges[n+1];
  F(i,n-1) {
    int a,b;
    cin >> a >> b;
    edges[a].pb(b);
    edges[b].pb(a);
  }
  vi beg[n+1];
  while (m--){
    int l,r;
    cin >> l >> r;
    beg[l].pb(r);
  }
  F(i,n-1) beg[i].push_back(i+1);
  priority_queue<int,vi,greater<int>> cur_segs;
  int ans = 1;
  F(i,n) {
    while (!cur_segs.empty() && cur_segs.top() == i) cur_segs.pop();
    if (i>1 && cur_segs.empty()) {
      ans = mult(ans,2);
    }
    for (auto it : beg[i]) cur_segs.push(it);
  }
  cout << ans << endl;
} 
    
                  
                             
signed main() { 
  ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
  #ifdef Local
  freopen("in","r",stdin);
  freopen("out","w",stdout); 
  #endif
  int t = 1;
  //cin >> t;
	F(i,t) solve();
}

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 82 ms 15500 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 155 ms 38620 KB Output is correct

Subtask #3
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 600 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 604 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 2 ms 1116 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 4 ms 1368 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 139 ms 47732 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #8
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 140 ms 46272 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #9
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 146 ms 47096 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #10
0 / 14.0

# Verdict Execution time Memory Grader output
1 Incorrect 135 ms 48068 KB Output isn't correct
2 Halted 0 ms 0 KB -