摘要: Given four lists A, B, C, D of integer values, compute how many tuples (i, j, k, l) there are such that A[i] + B[j] + C[k] + D[l] is zero. To make pro 阅读全文
posted @ 2017-04-21 14:13 amazingzoe 阅读(117) 评论(0) 推荐(0) 编辑