#include<bits/stdc++.h>
using namespace std;
define ll long long
int main()
{
ios::sync_with_stdio(false);
cin.tie(nullptr);
int t;
cin>>t;
while(t–){
int n;
cin>>n;
vectorarr(n);
vectorp(n);
for(int i=0;i<n;i++){
cin>>arr[i];
}
for(int i=0;i<n;i++){
cin>>p[i];
}
//case 1 one right one left
int left=0;
for(int i=1;i<n;i++){
if(arr[i-1]+p[i-1]>=arr[i]){
left=i;
}
else{
break;
}
}
int right=n-1;
for(int i=n-2;i>=0;i–){
if(arr[i+1]+p[i+1]>=arr[i]){
right=i;
}
else{
break;
}
}
if(right-left<=1){
cout<<“YES\n”;
continue;
}
//case 2 aribitrary balls
int righttm=0;
for(int i=1;i<n;i++){
if(arr[i]-p[i]<=arr[i-1]){
righttm=i;
}
else{
break;
}
}
int lefttm=n-1;
for(int i=n-2;i>=0;i–){
if(arr[i]+p[i]>=arr[i+1]){
lefttm=i;
}
else{
break;
}
}
if(lefttm-righttm<=1){
cout<<“YES\n”;
continue;
}
//all right
int changed=0;
for(int i=0;i<n-1;i++){
if(arr[i]+p[i]<arr[i+1]){
changed++;
}
}
if(changed<=1){
cout<<“YES\n”;
continue;
}
//all left
int chh=0;
for(int i=n-1;i>0;i–){
if(arr[i]-p[i]>arr[i-1]) chh++;
}
if(chh<=1){
cout<<“YES\n”;
continue;
}
cout<<“NO\n”;
}
return 0;
}
this is question from starters 137 here is the link Double Trouble Practice Coding Problem
let me find the fault in my logic guys. thanks in advance!