Galaxy的博客

http://acm.hdu.edu.cn/showproblem.php?pid=2044f[1]表示相差一时的路线数#include<stdio.h>int main(){ int n,a,b,i; __int64 f[50]; scanf("%d",&n); f[1] = 1; f[2] = 2; for(i = 3;i ...

http://acm.hdu.edu.cn/showproblem.php?pid=2057开始想偷懒只用16进制输入输出来解决，怎么也没有写出来，后来就把问题划归为进制转换问题，一步一步写了出来。#include<stdio.h>#include<string.h>__int64 fang(int i){ __int64 y = 1; int j; for(j ...

http://acm.hdu.edu.cn/showproblem.php?pid=2056#include<stdio.h>void swap(double *x,double *y){ double t; t = *x; *x = *y; *y = t;}int main(){ double x1,x2,x3,x4,y1,y2,y3,y4,x5,y5,x6,y6...

http://acm.hdu.edu.cn/showproblem.php?pid=2055#include<stdio.h>int main(){ int n,y; char x; scanf("%d",&n); getchar(); while(n--){ scanf("%c%d",&x,&y); getchar(); if(x &...

这道题题意说得不太清楚。。。参考了网上的一些解法，总结如下：比较简单的解法：http://blog.youkuaiyun.com/zhaorongxia/article/details/7629858c语言版：#include<stdio.h>#include<string.h>void qq(char *a){ int len,i; len=strlen(a)-1;...

http://acm.hdu.edu.cn/showproblem.php?pid=2053#include<stdio.h>#include<string.h>int a[100001];int main(){ int n,i,j; while(scanf("%d",&n) != EOF) { memset(a,0,sizeof(a)); fo...

http://acm.hdu.edu.cn/showproblem.php?pid=2052开始时把行列坐标搞错了#include<stdio.h>int main(){ int n,m,i,j; char s[75][75]; while(scanf("%d%d",&n,&m) != EOF){ for(i = 0;i <= m+1;i++) f...

http://acm.hdu.edu.cn/showproblem.php?pid=2051#include<stdio.h>int main(){ int n,a[30],i,j; while(scanf("%d",&n) == 1){ i = 0; while(n){ a[i++] = n%2; n = n/2; } for(j = i-1...

http://acm.hdu.edu.cn/showproblem.php?pid=2048错排公式说明：http://baike.baidu.com/view/668994.htmN张票的所有排列可能是Ann = N!种排列方式现在的问题就是N张票的错排方式有几种。首先我们考虑，如果前面N-1个人拿的都不是自己的票，即前N-1个人满足错排，现在又来了一个人，他手里拿的是自己的票。只要他把自己的票...

http://acm.hdu.edu.cn/showproblem.php?pid=2050其它参考：http://blog.youkuaiyun.com/lishuhuakai/article/details/8518245#include<stdio.h>int main(){ int c,n; scanf("%d",&c); while(c--){ scanf("%d",...

http://acm.hdu.edu.cn/showproblem.php?pid=2047#include<stdio.h>int main(){ int n,i,j; __int64 f[40]; f[1] = 3; f[2] = 8; for(i = 3;i < 40;i++){ f[i] = f[i-1]*2+f[...

http://acm.hdu.edu.cn/showproblem.php?pid=2045#include<stdio.h>int main(){ int n,i; __int64 f[51]; f[1] = 3; f[2] = 6; f[3] = 6; for(i = 4;i <= 50;i++) { ...

http://acm.hdu.edu.cn/showproblem.php?pid=2018 其它参考：http://hi.baidu.com/lileiyang12/item/55a6cc387dee6981f5e4ada4第n年牛总数由四部分组成，老母牛，一岁母牛，两岁母牛，三岁母牛，f[i-1] = i年老母牛+i年两岁母牛+i年三岁母牛；f[i-3] = i年一岁母牛。#include&l...

http://acm.hdu.edu.cn/showproblem.php?pid=2046#include<stdio.h>int main(){ int n,i; __int64 f[51]; f[1] = 1; f[2] = 2; for(i = 3;i <= 50;i++){ f[i] = f[i-1]+f[i-2...

http://acm.hdu.edu.cn/showproblem.php?pid=2041经典递推#include<stdio.h>int main(){ int n,m,y[41],i; scanf("%d",&n); y[1] = y[2] = 1; for(i = 3;i <= 40;i++) y[i] = y[...

http://acm.hdu.edu.cn/showproblem.php?pid=2058开始时用穷举法，时间总是超时。#include<stdio.h>#include<math.h>int main(){ int n,m,i,sum; double t; while(scanf("%d%d",&n,&m) == 2 && n...