A gourmet came into the banquet hall, where the cooks suggested n dishes for guests. The gourmet knows the schedule: when each of the dishes will be served. For i-th of the dishes he knows two integer moments in time ai and bi (in seconds from the be…

题目链接 给你n种菜, 每一种可以开始吃的时间不一样, 结束的时间也不一样. 求每种菜吃的时间都相同的最大的时间.时间的范围是0-10000. 看到这个题明显可以想到网络流, 但是时间的范围明显不允许我们把对每一个时间都连边. 那么我们可以对时间的区间连边, 对于一个区间, 如果一盘菜的开始时间>=这个区间的左端点, 结束时间小于右端点, 那么这盘菜就对这个时间段连边, 权值inf.然后每个时间段对汇点t连边, 权值为这段时间的长度. 源点s向每个菜连边, 权值为二分枚举的时间长度, 然后跑最大…

A gourmet came into the banquet hall, where the cooks suggested n dishes for guests. The gourmet knows the schedule: when each of the dishes will be served. For i-th of the dishes he knows two integer moments in time ai and bi (in seconds from the be…

F. Gourmet and Banquet time limit per test 2 seconds memory limit per test 512 megabytes input standard input output standard output A gourmet came into the banquet hall, where the cooks suggested n dishes for guests. The gourmet knows the schedule:…

题目链接:http://codeforces.com/problemset/problem/589/F A gourmet came into the banquet hall, where the cooks suggested n dishes for guests. The gourmet knows the schedule: when each of the dishes will be served. For i-th of the dishes he knows two integ…

Mr. Apple, a gourmet, works as editor-in-chief of a gastronomic periodical. He travels around the world, tasting new delights of famous chefs from the most fashionable restaurants. Mr. Apple has his own signature method of review  — in each restauran…

Ciel the Commander Time Limit: 1000ms Memory Limit: 262144KB This problem will be judged on CodeForces. Original ID: 321C64-bit integer IO format: %I64d      Java class name: (Any) Now Fox Ciel becomes a commander of Tree Land. Tree Land, like its na…

Little Elephant and Array Time Limit: 4000ms Memory Limit: 262144KB This problem will be judged on CodeForces. Original ID: 221D64-bit integer IO format: %I64d      Java class name: (Any) The Little Elephant loves playing with arrays. He has array a,…

Lucky Sum Time Limit: 2000ms Memory Limit: 262144KB This problem will be judged on CodeForces. Original ID: 121A64-bit integer IO format: %I64d      Java class name: (Any)     Petya loves lucky numbers. Everybody knows that lucky numbers are positive…

GukiZ and GukiZiana Time Limit: 10000ms Memory Limit: 262144KB This problem will be judged on CodeForces. Original ID: 551E64-bit integer IO format: %I64d      Java class name: (Any)   Professor GukiZ was playing with arrays again and accidentally di…