D. Fish Weight 题目连接: http://www.codeforces.com/contest/298/problem/D Description It is known that there are k fish species in the polar ocean, numbered from 1 to k. They are sorted by non-decreasing order of their weight, which is a positive number.…
A. Snow Footprints 题目连接: http://www.codeforces.com/contest/298/problem/A Description There is a straight snowy road, divided into n blocks. The blocks are numbered from 1 to n from left to right. If one moves from the i-th block to the (i + 1)-th blo…
A. Snow Footprints 如果只有L或者只有R,那么起点和终点都在边界上,否则在两者的边界. B. Sail 每次根据移动后的曼哈顿距离来判断是否移动. C. Parity Game 如果当前1的个数是偶数,则1的个数不会再增加:如果是奇数,则加1后不会再增加. 当前串可以组合成任意种组合,组合中的1不超过最大值. D. Fish Weight \(Diff = \sum{di\cdot wi}\) 假设\(w_1+=dw\),因为有\(0<w_1<=w_2<=\cdots&…
C. Parity Game 题目连接: http://www.codeforces.com/contest/298/problem/C Description You are fishing with polar bears Alice and Bob. While waiting for the fish to bite, the polar bears get bored. They come up with a game. First Alice and Bob each writes…
B. Sail 题目连接: http://www.codeforces.com/contest/298/problem/B Description The polar bears are going fishing. They plan to sail from (sx, sy) to (ex, ey). However, the boat can only sail by wind. At each second, the wind blows in one of these directio…
题目链接: http://codeforces.com/contest/606/problem/D D. Lazy Student time limit per test2 secondsmemory limit per test256 megabytes 问题描述 Student Vladislav came to his programming exam completely unprepared as usual. He got a question about some strange…
D. Lazy Student Student Vladislav came to his programming exam completely unprepared as usual. He got a question about some strange algorithm on a graph — something that will definitely never be useful in real life. He asked a girl sitting next to…
C. Alternative Thinking Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/604/problem/C Description Kevin has just recevied his disappointing results on the USA Identification of Cows Olympiad (USAICO) in the form of a binary…
A. Bits Time Limit: 20 Sec Memory Limit: 256 MB 题目连接 http://codeforces.com/contest/484/problem/A Description Let's denote as the number of bits set ('1' bits) in the binary representation of the non-negative integer x. You are given multiple queries…
B. Sort the Array 题目连接: http://codeforces.com/contest/451/problem/B Description Being a programmer, you like arrays a lot. For your birthday, your friends have given you an array a consisting of n distinct integers. Unfortunately, the size of a is to…
