Problem:
Score : 100 points

Problem Statement

You are given three integers A, B and C.
Determine whether C is not less than A and not greater than B.

Constraints

-100≤A,B,C≤100

A, B and C are all integers.

Input

Input is given from Standard Input in the following format:

A B C

Output

If the condition is satisfied, print Yes; otherwise, print No.

Sample Input 1

1 3 2

Sample Output 1

Yes

C=2 is not less than A=1 and not greater than B=3, and thus the output should be Yes.

Sample Input 2

6 5 4

Sample Output 2

No

C=4 is less than A=6, and thus the output should be No.

Sample Input 3

2 2 2

Sample Output 3

Yes

Solution in C++14 (GCC 5.4.1) (judge verdict: Wrong Answer)

#include <bits/stdc++.h>
using namespace std;

#define se second
#define fi first

typedef long long ll;

int main() {
	
	ll n,k;
	cin >> n >> k;
	vector<pair<ll,ll> >sk;
	ll ska,b;
	for(int i = 0;i<n;i++){
		cin >> ska >> b;
		sk.push_back(make_pair(ska,b));
	}
	sort(sk.begin(),sk.end());
	ll sum = 0;
	for(int i = 0;i<n;i++){
		sum += sk[i].se;
		if(sum >= k){
			cout << sk[i].fi;
			break;
		}
	}
	return 0;
}