Submission #12100167

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Source Code Expand

#include<bits/stdc++.h>
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
#define pi 3.141592653589793238
#define int long long
using namespace __gnu_pbds;
using namespace std;
template <typename T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;


signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);  
    cout.tie(0);   
#ifndef ONLINE_JUDGE
    if(fopen("INPUT.txt","r"))
    {
    freopen ("INPUT.txt" , "r" , stdin);
    freopen ("OUTPUT.txt" , "w" , stdout);
    }
#endif

// -------------------------------------Code starts here---------------------------------------------------------------------     

  int n,m;
  cin>>n>>m;
  int a[m];
  int s=0;
  for (int i = 0; i < m; i++)
  {
    cin>>a[i];
    s+=a[i];
  }
  n-=s;
  if(n<0)
    cout<<-1;
  else
    cout<<n;
 
// -------------------------------------Code ends here------------------------------------------------------------------
    clock_t clk;
  clk = clock();

    clk = clock() - clk;
  cerr << fixed << setprecision(6) << "Time: " << ((double)clk)/CLOCKS_PER_SEC << "\n";
  return 0;
}

Submission Info

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