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codeforces 835C Star sky
阅读量:5255 次
发布时间:2019-06-14

本文共 3123 字,大约阅读时间需要 10 分钟。

C. Star sky
time limit per test
2 seconds
memory limit per test
256 megabytes
input
standard input
output
standard output

The Cartesian coordinate system is set in the sky. There you can see n stars, the i-th has coordinates (xiyi), 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 (x1iy1i) and the upper right — (x2iy2i). 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.

Input

The first line contains three integers nqc (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 xiyisi (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 tix1iy1ix2iy2i (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.

Output

For each view print the total brightness of the viewed stars.

Examples
input
Copy
2 3 3 1 1 1 3 2 0 2 1 1 2 2 0 2 1 4 5 5 1 1 5 5
output
Copy
3 0 3
input
Copy
3 4 5 1 1 2 2 3 0 3 3 1 0 1 1 100 100 1 2 2 4 4 2 2 1 4 7 1 50 50 51 51
output
Copy
3 3 5 0
Note

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.

 

 题意:给你一个范围为100*100的天空,其中有很多星星,输入:n行为星星的亮度值,m行为查询时间t时区间(x1,y1) (x2,y2)的矩形范围内的星星的亮度值总和

题解:用一个三维数组sum[i][i][k]来表示在坐标(i,j)内的亮度为k的星星的数量,相当于二维前缀和表示了到i,j这个坐标的星星总数,再根据二维前缀和的容斥公式即求得

最后是O(C)的查询,c为星星亮度的最大值

代码如下:

#include
using namespace std;int mp[105][105][11];int sum[105][105][11];int main(){ int n,q,c; int x,y,s; int t,x1,y1,x2,y2; while(scanf("%d%d%d",&n,&q,&c) !=EOF){ memset(mp,0,sizeof(mp)); memset(sum,0,sizeof(sum)); for(int i=1;i<=n;i++){ scanf("%d%d%d",&x,&y,&s); mp[x][y][s]++; } for(int k=0;k<=c;k++){ for(int i=1;i<=100;i++){ for(int j=1;j<=100;j++){ sum[i][j][k]=sum[i-1][j][k]+sum[i][j-1][k]-sum[i-1][j-1][k]+mp[i][j][k]; } } } for(int i=0;i
View Code

 

转载于:https://www.cnblogs.com/buerdepepeqi/p/9445874.html

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