成段更新,需要用到延迟标记(或者说懒惰标记),简单来说就是每次更新的时候不要更新到底,用延迟标记使得更新延迟到下次需要更新or询问到的时候. 此处建议在纸上模拟一遍. Problem Description In the game of DotA, Pudge’s meat hook is actually the most horrible thing for most of the heroes. The hook is made up of several consecutive meta…
Just a Hook Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 15129 Accepted Submission(s): 7506 Problem Description In the game of DotA, Pudge’s meat hook is actually the most horrible thing f…
Color the ball Time Limit: 9000/3000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 7941 Accepted Submission(s): 4070 Problem Description N个气球排成一排,从左到右依次编号为1,2,3....N.每次给定2个整数a b(a <= b),lele便为骑上他的“小飞鸽"牌电动车从气球…
题意: long long data[250001]; void A( int st, int nd ) { for( int i = st; i \le nd; i++ ) data[i] = data[i] + (i - st + 1); } void B( int st, int nd ) { for( int i = st; i \le nd; i++ ) data[i] = data[i] + (nd - i + 1); } void C( int st, int nd, int x…
Just a Hook Time Limit: 4000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 13001 Accepted Submission(s): 6476 Problem Description In the game of DotA, Pudge’s meat hook is actually the most horrible thing…
对线段树的区间更新有了初步的了解... A Simple Tree Problem Time Limit: 3 Seconds Memory Limit: 65536 KB Given a rooted tree, each node has a boolean (0 or 1) labeled on it. Initially, all the labels are 0. We define this kind of operation: given a subtree, negat…
Color the Ball Time Limit: 2 Seconds Memory Limit: 65536 KB There are infinite balls in a line (numbered 1 2 3 ....), and initially all of them are paint black. Now Jim use a brush paint the balls, every time give two integers a b and follow by…
