911的专栏

Problem 83 f = file('83.txt','r') A = [] for l in f: A.append([int(i) for i in l.split(',')]) f.close() N = 80 B = [] for i in range(N): B.append([1000000 for i in range(N)]) B[0][0] = A[0][0

Triangle, square, pentagonal, hexagonal, heptagonal, and octagonal numbers are all figurate (polygonal) numbers and are generated by the following formulae: Triangle   P3,n=n(n+1)/2   1, 3,