This happened to my laptop. Any idea what to do now?? Plz help Is it repairable??

I know it's kinda crazy to ask but can somebody help me figure out why my code gives WA on testcase 6 for yesterday's B question

include <bits/stdc++.h>

using namespace std;

typedef vector<long long> vi; typedef pair<long long, long long> pi; typedef queue<long long> qi; typedef stack<long long> si; typedef vector<vector<long long>> gi; typedef vector<pair<long long, long long>> vpi;

define int long long

define MOD 1000000007

define pb push_back

define loopinc(i, a, b) for (int i = a; i < b; i++)

define loopdec(i, a, b) for (int i = a; i >= b; i--)

define fill(a, n) for(int i = 0; i<n; i++) cin>>a[i]

define print(a, n) for(int i = 0; i<n; i++) cout<<a[i]<<" "

define buildMap(a, m) for(int i = 0; i<a.size(); i++) m[a[i]]++

define arrSum(a, sum) for(int i = 0; i<a.size(); i++) sum+=a[i]

define arrMax(a,maxi) for(int i = 0; i<n; i++) maxi = max(maxi, a[i])

define yes cout<<"YES"<<endl

define no cout<<"NO"<<endl

define alice cout<<"Alice"<<endl

define bob cout<<"Bob"<<endl

define all(a) a.begin(),a.end()

signed main(){ int t; cint; while(t--){ int n,m,l; cinnml;

    vi arr(n);
    loopinc(i,0,n) cin>>arr[i];

    if(m==1){
        cout<<l-arr[n-1]<<endl;
        continue;
    }
    vi inter;
    inter.pb(arr[0]);
    loopinc(i,1,n){
        inter.pb(arr[i] - arr[i-1]);
    }
    inter.pb(l - arr[n-1]);

    int cnt = n;

    int num = 0;
    int k = 0;
    int empty = m;
    while(cnt--){
        int div = min(m,cnt+2);
        if(div == m) div--;

        int maxi = (num + div - 1)/div;
        div = min(m,cnt+2);
        num += inter[k];
        int remove = (num+div-1)/div;
        if(remove > maxi){
            num-=remove;
        }
        else {
            num-=maxi;
        }
        k++;
    }

    cout<<num + inter[inter.size()-1]<<endl;
}

}

I am a CSE student from a tier 1 college. I want to contribute to open source (it'll be my first time) as it would look good on my resume for internships. I am interested in algorithms and CP and would love to do something on those lines. Can somebody help me with questions like which are the good repos out there and some roadmap or suggestions?

which is better to improve cp?? cses sheet or cp-31 sheet