Codeforces 835C
来源:互联网 发布:张琪格的淘宝店 编辑:程序博客网 时间:2024/06/05 14:57
The Cartesian coordinate system is set in the sky. There you can see n stars, the i-th has coordinates (xi, yi), a maximum brightness c, equal for all stars, and an initial brightness si (0 ≤ si ≤ c).
Over time the stars twinkle. At moment 0 the i-th star has brightness si. Let at moment t some star has brightness x. Then at moment (t + 1) this star will have brightness x + 1, if x + 1 ≤ c, and 0, otherwise.
You want to look at the sky q times. In the i-th time you will look at the moment ti and you will see a rectangle with sides parallel to the coordinate axes, the lower left corner has coordinates (x1i, y1i) and the upper right — (x2i, y2i). For each view, you want to know the total brightness of the stars lying in the viewed rectangle.
A star lies in a rectangle if it lies on its border or lies strictly inside it.
The first line contains three integers n, q, c (1 ≤ n, q ≤ 105, 1 ≤ c ≤ 10) — the number of the stars, the number of the views and the maximum brightness of the stars.
The next n lines contain the stars description. The i-th from these lines contains three integers xi, yi, si (1 ≤ xi, yi ≤ 100, 0 ≤ si ≤ c ≤ 10) — the coordinates of i-th star and its initial brightness.
The next q lines contain the views description. The i-th from these lines contains five integers ti, x1i, y1i, x2i, y2i (0 ≤ ti ≤ 109, 1 ≤ x1i < x2i ≤ 100, 1 ≤ y1i < y2i ≤ 100) — the moment of the i-th view and the coordinates of the viewed rectangle.
For each view print the total brightness of the viewed stars.
2 3 31 1 13 2 02 1 1 2 20 2 1 4 55 1 1 5 5
303
3 4 51 1 22 3 03 3 10 1 1 100 1001 2 2 4 42 2 1 4 71 50 50 51 51
3350
Let's consider the first example.
At the first view, you can see only the first star. At moment 2 its brightness is 3, so the answer is 3.
At the second view, you can see only the second star. At moment 0 its brightness is 0, so the answer is 0.
At the third view, you can see both stars. At moment 5 brightness of the first is 2, and brightness of the second is 1, so the answer is 3.
思路:这题如果采用直接暴力法是肯定会TLE,所以应该才询问之前先统计一下各个位置同样亮度的星星有多少个,可以发现状态转移方程为dp[i][j][k]+=dp[i-1][j][k]+dp[i][j-1][k]-dp[i-1][j-1][k],然后就可以统计每种亮度的有多少个了。
代码:
#include <iostream>#include <stdio.h>#include <string.h>#include <algorithm>using namespace std;#define ll long long#define ma(a) memset(a,0,sizeof(a))int dp[105][105][11];int main(){ int n,q,c; while(~scanf("%d%d%d",&n,&q,&c)) { ma(dp); int i,j,k; for(i=0;i<n;i++) { int x,y,z; scanf("%d %d %d",&x,&y,&z); dp[x][y][z]++; } for(i=1;i<=100;i++) { for(j=1;j<=100;j++) { for(k=0;k<=c;k++) { dp[i][j][k]+=dp[i-1][j][k]+dp[i][j-1][k]-dp[i-1][j-1][k]; } } } while(q--) { ll t,sum=0; int x1,x2,y1,y2; cin>>t>>x1>>y1>>x2>>y2; for(i=0;i<=c;i++) { int ans=(t+i)%(c+1); sum+=(dp[x2][y2][i]+dp[x1-1][y1-1][i]-dp[x2][y1-1][i]-dp[x1-1][y2][i])*ans; } cout<<sum<<endl; } } return 0;}
- Codeforces 835C
- Codeforces-835C
- Codeforces 835C
- Codeforces 835C-Star sky
- codeforces 835 C Star sky
- Codeforces 835 C Star sky
- CodeForces 835C Star sky
- codeforces 835c Star sky
- Codeforces 835C Codeforces Round #427 (Div. 2)
- Codeforces #835C: Star Sky 题解
- codeforces 835C(二维前缀和)
- 【Codeforces 835 C. Star sky】+ dp
- CodeForces 835 C.Star sky(水~)
- Codeforces-340-C(c++)
- Codeforces-507-C(c++)
- CodeForces 731C C
- CodeForces-612C C
- CODEFORCES 265C CODEFORCES, 265C
- mapreduce maven文件
- 二叉数||AVL树
- Leetcode--Add to List 371. Sum of Two Integers
- 使用kubeadm安装kubernetes1.7
- ZZULIOJ【1087】获取出生日期【输入输出格式】
- Codeforces 835C
- QTP的datatable
- Unidirectional TSP
- IDEA创建maven项目详细步骤
- Win7系统的开机个性化
- eclipse快捷键 完整版
- [总结]FFMPEG视音频编解码零基础学习方法
- spring mvc 框架URL接收中文参数的乱码解决方案
- MFC中用CArchive类写入和读取文件