表达式求值 时间限制:1000 ms | 内存限制:65535 KB 难度:3 描述 假设表达式定义为:1. 一个十进制的正整数 X 是一个表达式.2. 如果 X 和 Y 是 表达式,则 X+Y, X*Y 也是表达式; *优先级高于+.3. 如果 X 和 Y 是 表达式,则 函数 Smax(X,Y)也是表达式,其值为:先分别求出 X ,Y值的各位数字之和,再从中选最大数.4．如果 X 是 表达式,则 (X)也是表达式. 例如:表达式 12*(2+3)+Smax(333,220+280) 的值…
Lazy Salesgirl Time Limit: 5 Seconds Memory Limit: 65536 KB Kochiya Sanae is a lazy girl who makes and sells bread. She is an expert at bread making and selling. She can sell the i-th customer some pieces of bread at price pi for each piece. But…
Unrequited Love Time Limit: 16 Seconds Memory Limit: 131072 KB There are n single boys and m single girls. Each of them may love none, one or several of other people unrequitedly and one-sidedly. For the coming q days, each night some of them wi…
Bullet Time Limit: 1000 ms Memory Limit: 65536 KiB Submit Statistic Discuss Problem Description In GGO, a world dominated by gun and steel, players are fighting for the honor of being the strongest gunmen. Player Shino is a sniper, and her aimed shot…
时间限制: 6 Sec 内存限制: 128 MB 题目描述 In GGO, a world dominated by gun and steel, players are fighting for the honor of being the strongest gunmen. Player Shino is a sniper, and her aimed shot kills one monster at a time. Now she is in an n × n map, and ther…
题目描述 Orz has two strings of the same length: A and B. Now she wants to transform A into an anagram of B (which means, a rearrangement of B) by changing some of its letters. The only operation the girl can make is to “increase” some (possibly none or…
时间限制: 10 Sec 内存限制: 128 MB 题目描述 Given l1,r1,l2,r2,l3,r3,l4,r4, please count the number of four-tuples (x1,x2,x3,x4) such that li≤ xi≤ ri and x1≠x2,x2≠x3,x3≠x4,x4≠x1. The answer should modulo 10^9+7 before output. 输入 The input consists of several test…
信道安全 时间限制:1000 ms | 内存限制:65535 KB 难度:2 描述 Alpha 机构有自己的一套网络系统进行信息传送.情报员 A 位于节点 1,他准备将一份情报 发送给位于节点 n 的情报部门.可是由于最近国际纷争,战事不断,很多信道都有可能被遭到监 视或破坏. 经过测试分析,Alpha 情报系统获得了网络中每段信道安全可靠性的概率,情报员 A 决定选 择一条安全性最高,即概率最大的信道路径进行发送情报. 你能帮情报员 A 找到这条信道路径吗? 输入 第一行: T 表示…
title: Intelligent Parking Building 河南省第十届省赛 tags: [模拟,省赛] 题目描述: There is a new revolution in the parking lot business: the parking building. The concept is simple: you drive your car into the elevator at the entrance of the building, and the elevat…
G.Code the Tree Time Limit: 2 Sec Memory Limit: 128 MB Submit: 35 Solved: 18 [Submit][Status][Web Board] Description A tree (i.e. a connected graph without cycles) with vertices numbered by the integers 1, 2, ..., n is given. The "Prufer" code…
10396: H.Rectangles Time Limit: 2 Sec Memory Limit: 128 MB Submit: 229 Solved: 33 [Submit][Status][Web Board] Description Given N (4 <= N <= 100) rectangles and the lengths of their sides ( integers in the range 1..1,000), write a program that fi…
10399: F.Turing equation Time Limit: 1 Sec Memory Limit: 128 MB Submit: 151 Solved: 84 [Submit][Status][Web Board] Description The fight goes on, whether to store numbers starting with their most significant digit or their least significant digit…
浪在ACM 集训队第九次测试赛 B Battleship E Masha and two friends B 传送门 题意: 战船上有占地n*n的房间cells[][],只由当cells[i][j]=='.'时才能够容纳水手. 已知水手需要k个连续的房间'.',可以是水平方向连续k个'.'或竖直方向的连续k个'.'. 问哪个坐标(x,y)含有最多的连续的k个房间,如果不存在,输出任意坐标. 题解: 我的做法:暴力 求出每个坐标最多含有多少种容纳水手的方式,找到最大的. 具体细节看代码: #inc…
title: Plumbing the depth of lake 河南省第十届省赛 题目描述: There is a mysterious lake in the north of Tibet. As the sun shines, the surface of the lake is colorful and colorful. The lake was unfathomable in rainy weather. After the probe, It has an interesti…
