突然觉得心好累,BestCoder在1500~1700之间一晃就是几个月,但我还是依旧那么水,怎么也跨不过1700的坎
1001 ZYB's Biology
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others)
Total Submission(s): 0 Accepted Submission(s): 0
Problem Description
After getting
600 scores in
NOIP
ZYB(ZJ−267) begins to work with biological questions.Now he give you a simple biological questions:
he gives you a
DNA sequence and a
RNA sequence,then he asks you whether the
DNA sequence and the
RNA sequence are
matched.
The
DNA sequence is a string consisted of
A,C,G,T ;The
RNA sequence is a string consisted of
A,C,G,U .
DNA sequence and
RNA sequence are matched if and only if
A matches
U ,
T matches
A ,
C matches
G ,
G matches
C on each position.
Input
In the first line there is the testcase
T .
For each teatcase:
In the first line there is one number
N .
In the next line there is a string of length
N ,describe the
DNA sequence.
In the third line there is a string of length
N ,describe the
RNA sequence.
1≤T≤10 ,
1≤N≤100
Output
For each testcase,print
YES or
NO ,describe whether the two arrays are matched.
Sample Input
2
4
ACGT
UGCA
4
ACGT
ACGU
Sample Output
Source
BestCoder Round #65
/************************************************************************/
附上该题对应的中文题
ZYB's Biology
Time Limit: 2000/1000 MS (Java/Others)
Memory Limit: 131072/131072 K (Java/Others)
问题描述
ZYB(ZJ-267)ZYB(ZJ−267)在NOIPNOIP拿到600600分之后开始虐生物题,他现在扔给你一道简单的生物题:给出一个DNADNA序列和一个RNARNA序列,
问它们是否配对。
DNADNA序列是仅由A,C,G,TA,C,G,T组成的字符串,RNARNA序列是仅由A,C,G,UA,C,G,U组成的字符串。
DNADNA和RNARNA匹配当且仅当每个位置上AA与UU,TT与AA,CC与GG,GG与CC匹配。
输入描述
第一行一个整数TT表示数据组数。
对于每组数据:
第一行一个整数NN表示DNADNA和RNARNA序列的长度.
第二行一个长度为NN的字符串AA表示DNADNA序列.
第三行一个长度为NN的字符串BB表示RNARNA序列.
1 \leq T \leq 101≤T≤10,1 \leq N \leq 1001≤N≤100
输出描述
对于每组数据,输出一行YESYES或NONO,表示是否匹配.
输入样例
2
4
ACGT
UGCA
4
ACGT
ACGU
输出样例
YES
NO
/****************************************************/
出题人的解题思路:
ZYB's Biology
直接按照题意模拟即可.
签到题,if语句判断一下就可以搞定了
#pragma comment(linker, "/STACK:1024000000,1024000000")
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<queue>
#include<stack>
#include<math.h>
#include<vector>
#include<map>
#include<set>
#include<cmath>
#include<string>
#include<algorithm>
#include<iostream>
#define exp 1e-10
using namespace std;
const int N = 105;
const int M = 10005;
const int inf = 1000000000;
const int mod = 2009;
char s1[N],s2[N];
int main()
{
int t,n,i,j;
scanf("%d",&t);
while(t--)
{
scanf("%d",&n);
scanf("%s",s1);
scanf("%s",s2);
for(i=j=0;i<n;i++,j++)
if(s1[i]=='A'&&s2[j]=='U'||s1[i]=='C'&&s2[j]=='G'||s1[i]=='G'&&s2[j]=='C'||s1[i]=='T'&&s2[j]=='A')
continue;
else
break;
if(i!=n)
puts("NO");
else
puts("YES");
}
return 0;
}
1002 ZYB's Game
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others)
Total Submission(s): 0 Accepted Submission(s): 0
Problem Description
ZYB played a game named
NumberBomb with his classmates in hiking:a host keeps a number in
[1,N] in mind,then
players guess a number in turns,the player who exactly guesses
X loses,or the host will tell all the players that
the number now is bigger or smaller than
X .After that,the range players can guess will decrease.The range is
[1,N] at first,each player should guess in the legal range.
Now if only two players are play the game,and both of two players know the
X ,if two persons all use the best strategy,and the first player guesses first.You are asked to find the number of
X that the second player
will win when
X is in
[1,N] .
Input
In the first line there is the number of testcases
T .
For each teatcase:
the first line there is one number
N .
1≤T≤100000 ,
1≤N≤10000000
Output
For each testcase,print the ans.
Sample Input
Sample Output
Source
BestCoder Round #65
/************************************************************************/
附上该题对应的中文题
ZYB's Game
Time Limit: 2000/1000 MS (Java/Others)
Memory Limit: 65536/65536 K (Java/Others)
问题描述
ZYBZYB在远足中,和同学们玩了一个“数字炸弹”游戏:由主持人心里想一个在[1,N][1,N]中的数字XX,然后玩家们轮流猜一个数字,如果一个玩家恰好猜中XX则算负,否则主持人将告诉全场的人当前的数和XX比是偏大还是偏小,然后猜测的范围就会相应减小,一开始的范围是[1,N][1,N].每个玩家只能在合法的范围中猜测.
现在假设只有两个人在玩这个游戏,并且两个人都已经知道了最后的XX,若两个人都采取最优策略.求X \in [1,N]X∈[1,N]中是后手胜利的XX数量.
输入描述
第一行一个整数TT表示数据组数。
接下来TT行,每行一个正整数NN.
1 \leq T \leq 1000001≤T≤100000,1 \leq N \leq 100000001≤N≤10000000
输出描述
TT行每行一个整数表示答案.
输入样例
1
3
输出样例
1
/****************************************************/
出题人的解题思路:
ZYB's Game
我们会发现这个模型其实是类比于左右两堆石子,每次可以在一堆里取任意多,取完的人胜利.当左右两堆石子相同时,我们可以简单的
构造后手胜利的方法:即在另一堆石子中取走同样多的石子,否则,先手可以取一些石子使得两堆石子相同.所以,当NN是奇数输出11,否则输出00.
这道题出题人写得还算详细,就算我们一时间想不出来也不要紧,我们完全可以举一下例子,从举例子的过程中发现规律,这是很多时候没有思路的情况下可以做的事情
#pragma comment(linker, "/STACK:1024000000,1024000000")
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#include<queue>
#include<stack>
#include<math.h>
#include<vector>
#include<map>
#include<set>
#include<cmath>
#include<string>
#include<algorithm>
#include<iostream>
#define exp 1e-10
using namespace std;
const int N = 105;
const int M = 10005;
const int inf = 1000000000;
const int mod = 2009;
int main()
{
int t,n,i,j;
scanf("%d",&t);
while(t--)
{
scanf("%d",&n);
if(n%2)
puts("1");
else
puts("0");
}
return 0;
}
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