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# Python解决codeforces ---- 4

 Python解决codeforces ---- 4 第一题 10A A. Power Consumption Calculation time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Tom is interested in power consumption of his favourite laptop. His laptop has three modes. In normal mode laptop consumes P1 watt per minute. T1 minutes after Tom moved the mouse or touched the keyboard for the last time, a screensaver starts and power consumption changes to P2 watt per minute. Finally, after T2 minutes from the start of the screensaver, laptop switches to the "sleep" mode and consumes P3 watt per minute. If Tom moves the mouse or touches the keyboard when the laptop is in the second or in the third mode, it switches to the first (normal) mode. Tom's work with the laptop can be divided into n time periods [l1, r1], [l2, r2], ..., [ln, rn]. During each interval Tom continuously moves the mouse and presses buttons on the keyboard. Between the periods Tom stays away from the laptop. Find out the total amount of power consumed by the laptop during the period [l1, rn]. Input The first line contains 6 integer numbers n, P1, P2, P3, T1, T2 (1 ≤ n ≤ 100, 0 ≤ P1, P2, P3 ≤ 100, 1 ≤ T1, T2 ≤ 60). The following nlines contain description of Tom's work. Each i-th of these lines contains two space-separated integers li and ri (0 ≤ li < ri ≤ 1440, ri < li + 1 for i < n), which stand for the start and the end of the i-th period of work. Output Output the answer to the problem. Sample test(s) input 1 3 2 1 5 10 0 10 output 30 input 2 8 4 2 5 10 20 30 50 100 output 570 题意：电脑有三种模式，正常模式每分钟耗电p1，如果没有使用电脑t1分钟后变成第二种模式每分钟耗电p2，站群系统，如果还是没有使用电脑t2分钟后变成第三种模式每分钟耗电p3。给定n个区间，每一个区间是正常模式，每个区间的间隔是没有使用，问总的耗电是多少 思路：直接暴力枚举 代码： [python] # input list = raw_input().split() n,p1,p2,t1,t2,t3 = map(int , list) # solve ans = 0 pre = -1 while n > 0: n -= 1 list = raw_input().split() start,end = map(int , list) ans += (end-start)*p1 if pre != -1: x = start-pre if x > t1: ans += t1*p1 x -= t1 if x > t2: ans += t2*p2 x -= t2 ans += x*p3 else: ans += x*p2 else: ans += x*p1 pre = end print ans 第二题 11A A. Increasing Sequence time limit per test 1 second memory limit per test 64 megabytes input standard input output standard output A sequence a0, a1, ..., at - 1 is called increasing if ai - 1 < ai for each i: 0 < i < t. You are given a sequence b0, b1, ..., bn - 1 and a positive integer d. In each move you may choose one element of the given sequence and add d to it. What is the least number of moves required to make the given sequence increasing? Input The first line of the input contains two integer numbers n and d (2 ≤ n ≤ 2000, 1 ≤ d ≤ 106). The second line contains space separated sequence b0, b1, ..., bn - 1 (1 ≤ bi ≤ 106). Output Output the minimal number of moves needed to make the sequence increasing. Sample test(s) input 4 2 1 3 3 2 output 3 题意：给定n个数的序列，现在要把这个序列变成递增的序列，满足ai < ai+1，现在规定每次可以选择一个数来增加d，问最少需要几次 思路：枚举每一个数求个数即可 代码： [python] # input n,d = map(int , raw_input().split()) list = map(int , raw_input().split()) # getAns ans = 0 for i in range(1,len(list)): if list[i] <= list[i-1]: x = (list[i-1]-list[i])/d+1 list[i] += x*d ans += x print ans 第三题 12A A. Super Agent time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output企业建站2800元起，携手武汉肥猫科技，做一个有见地的颜值派！更多优惠请戳：宜昌SEO http://yichang.4567w.com

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