Anyone know how to come up with these kind of solutions, because intuitively its not easy and took me a while? Thanks!

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

int32_t main(){

int t;
cin>>t;

while(t--){
    

    int n,q;
    cin>>n>>q;
    int a[n];
    for(int i =0; i<n; i++){
           cin>>a[i];
        }

int ans =a[0];


for(int i=1; i<n; i++){
   int x = a[i]-a[i-1];
   
   if(x>0){


    ans+=x;   

  }

    
  else continue;


}
cout<<ans<<endl;
}




}

Your code here...