转载请注明出处: http://www.cnblogs.com/fraud/          ——by fraud Intervals Time Limit: 10 Seconds      Memory Limit: 32768 KB You are given n closed, integer intervals [ai, bi] and n integers c1, ..., cn. Write a program that: > reads the number of interva…

Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 28416   Accepted: 10966 Description You are given n closed, integer intervals [ai, bi] and n integers c1, ..., cn. Write a program that: reads the number of intervals, their end points and…

Intervals Time Limit: 10000/5000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 4181    Accepted Submission(s): 1577 Problem Description You are given n closed, integer intervals [ai, bi] and n integers c1, ..., cn.…

Integer Intervals Time Limit: 1000MS   Memory Limit: 10000K Total Submissions: 12192   Accepted: 5145 Description An integer interval [a,b], a < b, is a set of all consecutive integers beginning with a and ending with b. Write a program that: finds t…

Intervals Time Limit: 10 Seconds      Memory Limit: 32768 KB You are given n closed, integer intervals [ai, bi] and n integers c1, ..., cn. Write a program that: > reads the number of intervals, their endpoints and integers c1, ..., cn from the stand…

题目:http://poj.org/problem?id=1201 题意:给定n组数据,每组有ai,bi,ci,要求在区间[ai,bi]内至少找ci个数, 并使得找的数字组成的数组Z的长度最小. #include <iostream> #include <cstdio> #include <cstring> #include <algorithm> #include <cstdlib> using namespace std; <<;…

题目:http://poj.org/problem?id=1201 差分约束裸套路:前缀和 本题可以不把源点向每个点连一条0的边,可以直接把0点作为源点.这样会快许多! 可能是因为 i-1 向 i 都连着一条0的边. 别忘了约束条件不仅有s[ i ] - s[ i-1 ] >= 0,还有s[ i ] - s[ i - 1] <= 1! 别忘了s的范围不是n而是mx! #include<iostream> #include<cstdio> #include<cstr…

题目:http://poj.org/problem?id=1201 差分约束裸题: 设 s[i] 表示到 i 选了数的个数前缀和: 根据题意,可以建立以下三个限制关系: s[bi] >= s[ai-1] + ci ( 1 <= i <= n) s[i] >= s[i-1] + 0 ( 1 <= i <= mx) s[i-1] >= s[i] + (-1) (1 <= i <= mx) 然后求最长路,可以发现其中的 dis 值不会多余增大,也就满足题意要…

Time Limit: 2000MS   Memory Limit: 65536K Total Submissions: 27746   Accepted: 10687 Description You are given n closed, integer intervals [ai, bi] and n integers c1, ..., cn. Write a program that: reads the number of intervals, their end points and…

/* 给你 n 个区间 [Ai, Bi],要求从每一个区间中至少选出 Ci 个数出来组成一个序列 问:满足上面条件的序列的最短长度是多少? 则对于 不等式 f(b)-f(a)>=c,建立 一条 b 到 a 的边 权值为 c,则求的最长路 即为 最小值(集合) 而且有隐含条件:0<=f(a)-f(a-1)<=1 则有边权关系(a,a-1,0)以及(a-1,a,-1); */ /* 一般地,差分约束系统分两类:求最大差和最小差 1.求最大差 建立形如 A-B<=C 的不等式.在原图中加…