题解| #4 Values whose Sum is 0# 4 Values whose Sum is 0 https://ac.nowcoder.com/acm/problem/107382 在此处时,是将前两列的数字进行相加,然后对后两列的数字进行相加,再分别用两个数组分别记录前两列和后两列的数字的结果,对后两列的数组的结果进行单调递增的排序,然后对后两列的数组采用lower_...
The first line of the input file contains the size of the lists n (this value can be as large as 4000). We then have n lines containing four integer values (with absolute value as large as 228) that belong respectively to A, B, C and D . Output For each input file, your program...
4 Values whose Sum is 0 Description The SUM problem can be formulated as follows: given four lists A, B, C, D of integer values, compute how many quadruplet (a, b, c, d ) ∈ A x B x C x D are such that a + b + c + d = 0 . In the following, we assume that all l...
38 int ans = 0; 39 for(int left = 1; left < k; ++left) 40 { 41 while(right > 0 && s1[left] + s2[right] > 0) 42 right--; 43 44 if(right < 0) 45 break; 46 47 int tmp = right; // 一组left可能对应多组right解 48 while(right > 0 && s1[left] + s2[right] == ...
POJ 2785(4 Values whose Sum is 0) 【题意描述】 对于给定的四个序列,从每个序列中选出一个数,并让四个数相加,输出所有相加和为0的情况数目。 【解题思路】 我们可以考虑前两列的数字相加之和一定与后两列相加和互为相反数,那么我们可以枚举出前两列数字之和,并且,枚举出后两列数据之和的相反数,并对...
//values whose sum is 0 //二分，在三四列的数据中二分找一二列的数据 #include <iostream> #include <algorithm> using namespace std; typedef long long ll; int n;题目
再用双指针判断前两列和与后两列和的和是否为0,若为0, 则把 前两列中该计算值出现次数 乘上 后两列中该计算值出现次数。(双指针时间复杂度nnn) 基于上面的思想写出如下代码: poj——TLE代码: #include<iostream> #include #include<vector> #include...
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UVa1152 - 4 Values whose Sum is 0(hash) hash结构体 struct Hash_map{ static const int mask=0x7fffff; int p[8388608],q[8388608]; void clear(){ for(int i=0;i<=mask;++i) q[i]=0; } int & operator [] (int k){ int i; for(i=k&mask; q[i]&&p[i]!=k; i=(i+1)&mask...
2016-08-10 20:22 −4 Values whose Sum is 0 Time Limit: 15000MS Memory Limit: 228000K Total Submissions: 20015 Accepted: 5974 Ca... 月夜下 0 192 POJ-2785-4 Values whose Sum is 0 2018-07-24 21:34 −4 Values whose Sum is 0 Description The SUM problem can be formulated as fol...