fork download
copy 
  1.  
  2. #include <bits/stdc++.h>
  3. using namespace std;
  4.  
  5. int main()
  6. {
  7.     vector<int>v={1,-1,1,-1,1,1,1,-1,-1};
  8.     int n=v.size();
  9.     unordered_map<int,int>mp;
  10.     mp[0]=1;
  11.     int sum=0;
  12.     int count=0;
  13.     for(int i=0;i<n;i++){
  14.         sum=sum+v[i];
  15.         if(mp.find(sum)!=mp.end()){
  16.             count+=mp[sum];
  17.         }
  18.         mp[sum]++;
  19.     }
  20.  
  21.     cout<<count<<endl;
  22.  
  23.     return 0;
  24. }
Success #stdin #stdout 0s 5324KB
comments (?)
stdin
copy 
Standard input is empty
stdout
copy 
10
https://ideone.com/Y70kY8
language:
C++ (gcc 8.3)
created:
1 day ago
visibility:
public

Share or Embed source code

Discover > Sphere Engine API

The brand new service which powers Ideone!

Discover > IDE Widget

Widget for compiling and running the source code in a web browser!