Created (CODECHEF) CUM- Chef and Sum

Author: kunalkumbhar7

Vectors/(CODECHEF) CSUM - Chef and Sum.cpp

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+#include <iostream>
+#include<bits/stdc++.h>
+#define lli long long int
+using namespace std;
+
+int main() {
+	lli t;
+	cin>>t;
+	while(t--){
+	    lli n,k,i,j;
+	    cin>>n>>k;
+	    int flag = 0;
+	    lli a[n];
+	    for(i = 0; i<n; cin>>a[i], i++);
+	    i = 0;
+	    j = n-1;
+	    sort(a,a+n);
+	    while(i<j){
+	        if ((a[i]+a[j])==k){
+	            flag = 1;
+	            cout<<"Yes"<<"\n";
+	            break;
+	        }
+	        else if((a[i]+a[j])>k){
+	            j--;
+	        }
+	        else{
+	            i++;
+	        }
+	    }
+	    if (!flag){
+	        cout<<"No"<<"\n";
+	    }
+	}
+	return 0;
+}