equilibrium_point.cpp

classSolution{
public:
// Function to find equilibrium point in the array.
// a: input array
// n: size of array
intequilibriumPoint(longlong a[], int n) {

longlong total_sum = 0, temp_sum = 0;

for(int i = 0 ; i < n ; i++){
 total_sum += a[i];
 }

for(int i = 0 ; i < n ; i++){
if(total_sum - temp_sum - a[i] == temp_sum){
return i + 1;
 }
 temp_sum += a[i];
 }
return -1;
 }
};