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Nov 14th, 2019
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  1. //Alhamdulillah
  2. //Md. Masrur Saqib-RUET-1803
  3. //Created on 06-09-2019 11.30
  4.  
  5. #include<bits/stdc++.h>
  6. #define ll long long
  7. #define pb push_back
  8. #define dd double
  9. #define endl "\n"
  10.  
  11. using namespace std;
  12.  
  13. int main()
  14. {
  15.     ios_base::sync_with_stdio(false);
  16.     cin.tie(NULL);
  17.  
  18.     ll n, m,a,b,lar=0,k;
  19.     cin >> n >> m;
  20.     ll ara[n];
  21.     for(ll i = 0; i<n; i++){
  22.         ara[i] = 0;
  23.     }
  24.     for(ll i=0; i<m ; i++){
  25.         cin >> a >> b >> k;
  26.         a--;
  27.         b--;
  28.         for(ll j = a; j<=b ; j++){
  29.             ara[j] += k;
  30.             //cout << "hi" <<endl;
  31.         }
  32.     }
  33.     for(ll i = 0; i<n ; i++){
  34.         lar = (lar>ara[i])?lar:ara[i];
  35.     }
  36.     cout << lar << endl;
  37.  
  38.     return 0;
  39. }
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