#include <bits/stdc++.h>
using namespace std;

int main() {
	int arr[]= {1,0,1,2,10,5};
	int n=sizeof(arr)/sizeof(arr[0]);
	int sum=3;
	int count=0;
	vector<int> prefixSum(n);
	prefixSum[0]=arr[0];
	for(int i=1;i<n;i++)
		prefixSum[i]=prefixSum[i-1]+arr[i];
	for(int j=0;j<n;j++){
		if(prefixSum[j]==sum)
			count++;
		for(int i=0;i<j;i++){
			if(prefixSum[i]==prefixSum[j]-sum)
				count++;
		}
	}
	cout<<count;
	return 0;
}