E. Pointstime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputYou are given N points on a plane. Write a program which will find the sum of squares of distances between all pairs of points.InputThe first line of input contains one integer number N (1 ≤ N ≤ 100 000) — the number of points. Each of the following N lines contain two integer numbers X and Y ( - 10 000 ≤ X, Y ≤ 10 000) — the coordinates of points. Two or more points may coincide.OutputThe only line of output should contain the required sum of squares of distances between all pairs of points.ExamplesInput41 1-1 -11 -1-1 1Output32
Input41 1-1 -11 -1-1 1
Output32
['implementation', 'math', '*1700']