Merge pull request fineanmol#5658 from Amisha2093/master

Add equilibriumpoint.cpp

Program's_Contributed_By_Contributors/C++ Programs/Array/equilibriumpoint.cpp

@@ -0,0 +1,33 @@
+// Equilibrium Point
+// Find an equilibrium point such that sum of elements before it is equal to sum of elements after it.
+
+#include<bits/stdc++.h>
+using namespace std;
+#define eff ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
+#define vi vector<int>
+
+signed main(){
+    eff;
+    int n;
+    cin>>n;
+    vi v(n);
+    for(int i = 0; i < n; i++)
+         cin>>v[i];
+
+    int sum = accumulate(v.begin(), v.end(), 0);
+    int left = 0;
+    for(int i = 0; i < n; i++)
+    {
+        if(left == sum - v[i])
+        {
+            cout<<i<<" ";
+            break;
+        }
+        left += v[i];
+        sum-=v[i];
+    }
+    return 0;
+}
+
+// Time Complexity: O(n)
+// Space Complexity: O(1)