Codeforces Round #427 (Div. 2) Problem C Star sky (Codeforces 835C) - 前缀和
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 3 1 1 1 3 2 0 2 1 1 2 2 0 2 1 4 5 5 1 1 5 5
3 0 3
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
3 3 5 0
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.
题目大意 天空中有一些星星,每个星星有一个初始亮度,如果一个星星的初始亮度为s, 那么在时刻t, 它的亮度为(s + t) % (c + 1)。有q个询问,询问在某一时刻天空中某个矩形内所有星星的亮度和。
x, y很小,c很小,而且有趣的是10 * 100 * 100 = 100000,标准cf数据范围。
所以考虑对每种星星的初始亮度搞一个前缀和。这样对于某一时刻,你可以算出某个矩形内亮度为x的星星数目。
于是这道题就很简单了。。
值得高兴的是,终于在考试的时候把C题A掉了。。。好开心。。一直认为C题有毒,每次都会做,每次都挂。
Code
/**
* Codeforces
* Problem#835C
* Accepted
* Time:156ms
* Memory:3700k
*/
#include <bits/stdc++.h>
#ifndef WIN32
#define Auto "%lld"
#else
#define Auto "%I64d"
#endif
using namespace std;
typedef bool boolean;
const signed int inf = (signed)((1u << ) - );
const signed long long llf = (signed long long)((1ull << ) - );
const double eps = 1e-;
const int binary_limit = ;
#define smin(a, b) a = min(a, b)
#define smax(a, b) a = max(a, b)
#define max3(a, b, c) max(a, max(b, c))
#define min3(a, b, c) min(a, min(b, c))
template<typename T>
inline boolean readInteger(T& u){
char x;
int aFlag = ;
while(!isdigit((x = getchar())) && x != '-' && x != -);
if(x == -) {
ungetc(x, stdin);
return false;
}
if(x == '-'){
x = getchar();
aFlag = -;
}
for(u = x - ''; isdigit((x = getchar())); u = (u << ) + (u << ) + x - '');
ungetc(x, stdin);
u *= aFlag;
return true;
} int n, q, c;
int xs[], ys[], ss[];
int sum[][][]; inline void init() {
scanf("%d%d%d", &n, &q, &c);
for(int i = ; i <= n; i++) {
scanf("%d%d%d", xs + i, ys + i, ss + i);
}
} inline void getPreSum() {
memset(sum, , sizeof(sum));
for(int i = ; i <= n; i++) {
sum[xs[i]][ys[i]][ss[i]]++;
}
for(int i = ; i <= ; i++) {
for(int j = ; j <= ; j++) {
for(int k = ; k <= ; k++)
sum[i][j][k] += sum[i - ][j][k] + sum[i][j - ][k] - sum[i - ][j - ][k];
}
}
} inline int getAns(int x, int y, int t0) {
int rt = ;
for(int i = ; i <= ; i++)
rt += (sum[x][y][i]) * ((i + t0) % (c + ));
return rt;
} inline void solve() {
int t0, x0, y0, x1, y1;
while(q--) {
scanf("%d%d%d%d%d", &t0, &x0, &y0, &x1, &y1);
printf("%d\n", getAns(x1, y1, t0) - getAns(x0 - , y1, t0) - getAns(x1, y0 - , t0) + getAns(x0 - , y0 - , t0));
}
} int main() {
init();
getPreSum();
solve();
return ;
}
Codeforces Round #427 (Div. 2) Problem C Star sky (Codeforces 835C) - 前缀和的更多相关文章
- Codeforces Round #427 (Div. 2) Problem D Palindromic characteristics (Codeforces 835D) - 记忆化搜索
Palindromic characteristics of string s with length |s| is a sequence of |s| integers, where k-th nu ...
- Codeforces Round #427 (Div. 2) Problem A Key races (Codeforces 835 A)
Two boys decided to compete in text typing on the site "Key races". During the competition ...
- 【Codeforces Round #427 (Div. 2) C】Star sky
[Link]:http://codeforces.com/contest/835/problem/C [Description] 给你n个星星的坐标(xi,yi); 第i个星星在第t秒,闪烁值变为(s ...
- Codeforces Round #427 (Div. 2) Problem B The number on the board (Codeforces 835B) - 贪心
Some natural number was written on the board. Its sum of digits was not less than k. But you were di ...
- Codeforces Round #425 (Div. 2) Problem C Strange Radiation (Codeforces 832C) - 二分答案 - 数论
n people are standing on a coordinate axis in points with positive integer coordinates strictly less ...
- CodeForces 835C - Star sky | Codeforces Round #427 (Div. 2)
s <= c是最骚的,数组在那一维开了10,第八组样例直接爆了- - /* CodeForces 835C - Star sky [ 前缀和,容斥 ] | Codeforces Round #4 ...
- CodeForces 835D - Palindromic characteristics | Codeforces Round #427 (Div. 2)
证明在Tutorial的评论版里 /* CodeForces 835D - Palindromic characteristics [ 分析,DP ] | Codeforces Round #427 ...
- Codeforces Round #427 (Div. 2) [ C. Star sky ] [ D. Palindromic characteristics ] [ E. The penguin's game ]
本来准备好好打一场的,然而无奈腹痛只能带星号参加 (我才不是怕被打爆呢!) PROBLEM C - Star sky 题 OvO http://codeforces.com/contest/835/p ...
- Codeforces Round #716 (Div. 2), problem: (B) AND 0, Sum Big位运算思维
& -- 位运算之一,有0则0 原题链接 Problem - 1514B - Codeforces 题目 Example input 2 2 2 100000 20 output 4 2267 ...
随机推荐
- IDEA2017及DataGrip2017注册码
访问http://idea.lanyus.com/,网页中有相关说明,最简单的方式是将“0.0.0.0 account.jetbrains.com”添加到hosts文件中,然后点击页面底部的“获得注册 ...
- HTML5 缓存
一.在html/htm文件中声明缓存,声明方式: <!DOCTYPE HTML> <html manifest="demo.appcache">...3 & ...
- 018-AJAX异步请求XMLHttpRequest
创建XMLHttpRequest对象 一.先来创建XMLHttpRequest对象在IE.Firefox.safari和Opera中创建该对象的JavaScript代码为: var xhr = new ...
- MYSQLi数据访问分页查询
<?php //分页工具 直接加载使用 /** file: page.class.php 完美分页类 Page */ class Page { private $total; //数据表中总记录 ...
- Java IO留存查看
IO也可以写作为 "i/O" ,也可以理解为In和Out,即输入与输出.所以,IO体系的基本功能就是: 读和写. IO流作用:读写设备上的东西,硬盘文件.内存.键盘.网络... 根 ...
- Deep Learning论文笔记之(四)CNN卷积神经网络推导和实现
https://blog.csdn.net/zouxy09/article/details/9993371 自己平时看了一些论文,但老感觉看完过后就会慢慢的淡忘,某一天重新拾起来的时候又好像没有看过一 ...
- python内置函数zip
zip() 函数用于将可迭代的对象作为参数,将对象中对应的元素打包成一个个元组,然后返回由这些元组组成的列表. 如果各个迭代器的元素个数不一致,则返回列表长度与最短的对象相同,利用 * 号操作符,可以 ...
- Hinton“深度学习之父”和“神经网络先驱”,新论文Capsule将推翻自己积累了30年的学术成果时
Hinton“深度学习之父”和“神经网络先驱”,新论文Capsule将推翻自己积累了30年的学术成果时 在论文中,Capsule被Hinton大神定义为这样一组神经元:其活动向量所表示的是特定实体类型 ...
- oracle函数,游标,视图使用总结
oracle函数或者叫存储过程,在实际的开发过程中对于复杂的业务需求是非常有用的,非常有效率的也是非常好玩儿的一个技术点. 平常在开发过程中对于CRUD功能较多.一般SQL即可应付,大不了就是长一点而 ...
- python 网页cookie的使用
网页cookie的使用 Cookie,指某些网站为了辨别用户身份.进行session跟踪而储存在用户本地终端上的数据(通常经过加密) # opener的概念当你获取一个URL你使用一个opener(一 ...