Why is this not working

#1

while i am doing as it was in the lecture t fails on some testcases please help:
#include<bits/stdc++.h>
#define int long long
using namespace std;
signed main(){
int tc;
cin>>tc;
while(tc–){
int n,sum=0;
cin>>n;
int arr[n];
for(int i=0;i<n;i++)cin>>arr[i];
for(int i=1;i<n;i++){
arr[i]+=arr[i-1];
}
map<int,int> mp;
mp[0]++;
for(int i=0;i<n;i++){
mp[arr[i]%n]++;
}
for(auto c:mp){
sum=sum+((c.second)*(c.second-1)/2);
}
cout<<sum<<endl;
}
return 0;
}

#2

Share your code via ide.codingblocks.com with proper indentation.

#3

Please help me with this problem I have been stuck here for so long

#4
#5

Just now you have shared the link.
I’ll get back to you asap

#6

i have made some changes. Check now.

#7

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#8

explain the changes to me

#9

I don’t remember after so many days, kindly compare the two codes yourself now :slight_smile: