1481B - New Colony - CodeForces Solution

#include <bits/stdc++.h>

using namespace std;
 
int main(){
   int t; cin>>t;
   while(t--){
    int n,k; cin>>n>>k;
    vector<int> v;
    for (int i = 0; i < n; i++){
        int m;cin>>m;v.push_back(m);
    }
   int store=-1;
   int check=0;
    for (int i = 0; i < k; i++){
        for(int j=0;j+1<n;j++){
                if(v[j]<v[j+1]){
                    check=0;
                    store=j+1;
                    v[j]++;
                    break;
                }
                check=1;
                store=-1;

        } 
        if(check) break;

          
    }
    cout<<store<<endl;


    
        }
    }