Codeforces 850 A. Five Dimensional Points(暴力/抽屉定理)
来源:互联网 发布:如何注册网络作家 编辑:程序博客网 时间:2024/06/05 07:34
题目:http://codeforces.com/problemset/problem/850/A
题意:给你在五维空间的n个点,没有相同的点。a点bad,如果和其他两点组成的角有小于90度的情况,反之good
思路:根据抽屉定理,可以判断good的情况最多有11个点(直角和锐角肯定只能存在不同象限或者坐标轴上),再多的话肯定会有锐角的情况,这个还是三维容易看些
(其实暴力枚举可过
代码:
#include<bits/stdc++.h>using namespace std;typedef long long ll;int pos[1005];struct node{ int a[5];}p[1005];int main(){ int n; scanf("%d",&n); for(int i = 1;i <= n;i++) for(int j = 0;j < 5;j++) scanf("%d",&p[i].a[j]); if(n > 11) return 0 * printf("0\n"); bool flag; int sum = 0; for(int i = 1;i <= n;i++) { flag = false; for(int j = 1;j <= n;j++) { if(i == j) continue; for(int k = j+1;k <= n;k++) { if(i == k) continue; int t = 0; for(int h = 0;h < 5;h++) t += (p[i].a[h]-p[j].a[h])*(p[i].a[h]-p[k].a[h]); if(t > 0) { flag = true; break; } } if(flag) break; } if(!flag) pos[++sum] = i; } printf("%d\n",sum); for(int i = 1;i <= sum;i++) printf("%d\n",pos[i]); return 0;}
阅读全文
0 0
- Codeforces 850 A. Five Dimensional Points(暴力/抽屉定理)
- - Five Dimensional Points(暴力)
- Five Dimensional Points CodeForces
- codeforces 851C Five Dimensional Points 鸽巢定理
- Codeforces Round #432 (Div. 1) A.Five Dimensional Points
- Codeforces Round #432 (Div. 2) C 850A Five Dimensional Points(思维)
- codeforces851C. Five Dimensional Points(暴力/思维)
- Codeforces 851 C Five Dimensional Points(数学概念优化)
- codeforces 851 C (Div#432) Five Dimensional Points
- codeforce 850A Five Dimensional Points(特殊判别)
- codeforces 851C C. Five Dimensional Points
- Codeforces Round #432 C. Five Dimensional Points
- Codeforces Round #432 Div. 2 C. Five Dimensional Points(数学)
- codeforces 851 #432 div2 C Five Dimensional Points
- Codeforces Round #432 (Div. 2) C Five Dimensional Points
- Codeforces 851C . Five Dimensional Points 计算几何,结论
- Codeforces 392A Blocked Points(暴力)
- Codeforces Round #432 (Div. 2, based on IndiaHacks Final Round 2017)C. Five Dimensional Points
- 排序算法之桶排序
- TP5 M生命周期笔记
- (CodeForces
- linux线程的挂起和唤醒
- 操作系统的发展过程
- Codeforces 850 A. Five Dimensional Points(暴力/抽屉定理)
- java的jdk环境配置
- 优化Hibernate
- 哇,我的CSDN被盗啦!
- SGU 495 Kids and Prizes (概率期望DP)
- Vue集成Markdown插件
- genymotion 无法安装genymotion-arm-translation.zip
- 软件推荐:日常软件
- 在windows 下生成动态dll