Submission #521495

#	Time	Username	Problem	Language	Result	Execution time	Memory
521495		Rasoul006	Usmjeri (COCI17_usmjeri)	C++17	0 / 140	112 ms	7356 KiB

usmjeri

#include <bits/stdc++.h>

#define endl "\n"

typedef long long ll;

using namespace std;

const int N = 1e6+5;
const int mod = 1e9+7;
ll n , m , is[300009] ;
pair < ll , ll > pr[300009] ;
int main()
{
    ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin >> n >> m ;
    for(int i = 0 ; i < n - 1 ; i++){
        ll a , b ;
        cin >> a >> b ;
    }
    for(int i =1 ; i <= m ; i++){
        cin >> pr[i].first >> pr[i].second ;
        is[pr[i].first] = 1 ;
        is[pr[i].second] = -1 ;
    }
    for(int i = 1 ; i < n  ;i++){
        is[i] += is[i-1] ;
    }
    ll ans = 1 ;
    ll r = -1 ;
    for(int i = 1 ; i <= m  ;i++){
        if(pr[i].first >= r){
            r = pr[i].second ;
            ans = ((ans % mod) * (2 % mod)) % mod ;
        }
    }
    for(int i = 1 ; i < n ; i++){
        if(is[i] == 0){
            ans = ((ans % mod) * (2 % mod)) % mod ;
        }
    }
    cout << ans << endl ;
    return 0;
}

• Subtask 1: 0 / 14
• Subtask 2: 0 / 14
• Subtask 3: 0 / 14
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