Two Buttons time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vasya has found a strange device. On the front panel of a device there are: a red button, a blue button and a display showing so…

/*题意:一个数,就是输入的第一个数,让它变成第二个数最少用几步.可以点红色按钮,蓝色按钮来改变数字,红色:*2,蓝色:-1,如果变成负数,就变成原来的数.CF 520 B. Two Buttons思路:当然是*2可以掠过的步数更少啦,如果n是输入,m是输出. 如果n大于m,不能使用红色按钮,很容易看出,步数就是n-m. 如果n比m小,如果m是偶数的话,m/2,如果m是奇数,m+1,这样一直循环判断n是不是还比m小,不符合就跳出循环,进入第一个如果.*/ /*正向BFS #include<ios…

 Two Buttons time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vasya has found a strange device. On the front panel of a device there are: a red button, a blue button and a display showing s…

B. Two Buttons time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vasya has found a strange device. On the front panel of a device there are: a red button, a blue button and a display showing…

http://codeforces.com/contest/676/problem/D 题目大意: 勇者去迷宫杀恶龙.迷宫是有n*m的方格子组成的.迷宫上有各种记号,这些记号表达着能走的方向.当且仅当两个房间的记号是相互联通的,才能走过去. 我们有如下选择,最直白的一种就是直接走到另外一个格子上去(当然格子得相互连通),第二种操作就是顺时针旋转所有的格子(格子的位置保持不变). 问,勇者要多久才能走到恶龙所在的地方. 思路: 表示这道题真心不会...下面的这个代码也是参考了别人的吧...换成我的…

 Two Buttons time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vasya has found a strange device. On the front panel of a device there are: a red button, a blue button and a display showing s…

1.CF #375 (Div. 2)  D. Lakes in Berland 2.总结:麻烦的bfs,但其实很水.. 3.题意:n*m的陆地与水泽,水泽在边界表示连通海洋.最后要剩k个湖,总要填掉多少个湖,然后输出. #include<bits/stdc++.h> #define F(i,a,b) for (int i=a;i<b;i++) #define FF(i,a,b) for (int i=a;i<=b;i++) #define mes(a,b) memset(a,b,s…

http://codeforces.com/contest/520/problem/B Two Buttons Vasya has found a strange device. On the front panel of a device there are: a red button, a blue button and a display showing some positive integer. After clicking the red button, device multipl…

B. Two Buttons time limit per test : 2 seconds memory limit per test :256 megabytes input :standard input output : standard output Vasya has found a strange device. On the front panel of a device there are: a red button, a blue button and a display s…

[CF简单介绍] 提交链接:Two Buttons 题面: B. Two Buttons time limit per test 2 seconds memory limit per test 256 megabytes input standard input output standard output Vasya has found a strange device. On the front panel of a device there are: a red button, a blu…