| ||||||||||
| Online Judge | Problem Set | Authors | Online Contests | User | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Web Board Home Page F.A.Qs Statistical Charts | Current Contest Past Contests Scheduled Contests Award Contest | |||||||||
Re:看了好久,觉得跟你们写的没差呀,无限WA,大神帮忙看看In Reply To:看了好久,觉得跟你们写的没差呀,无限WA,大神帮忙看看 Posted by:ds570 at 2017-04-19 18:49:03 > #include<stdio.h>
> #include<string.h>
> int bit[35];
> int c[34][34]={0};
>
> void init()
> {
> for(int j=0;j<34;j++)
> {
> for(int i=0;i<=j;i++)
> {
> if(!i||i==j)
> c[i][j]=1;
> else
> {
> c[i][j]=c[i][j-1]+c[i-1][j-1];
> }
> }
> }
> }
>
> void tobit(int n)
> {
> int cnt=0;
> while(n)
> {
> bit[++cnt]=n%2;
> n/=2;
> }
> bit[0]=cnt;
> }
>
> int roudnum(int n)
> {
> tobit(n);
> int ans=0;
> for(int i=1;i<bit[0]-1;i++)
> {
> for(int j=i/2+1;j<=i;j++)
> {
> ans+=c[j][i];
> }
> }
> int zero=0;
> for(int i=bit[0]-1;i>=1;i--)
> {
> if(bit[i])
> {
> for(int j=(bit[0]+1)/2-(zero+1);j<i;j++)
> {
> ans+=c[j][i-1];
> }
> }
> else zero++;
> }
> return ans;
> }
>
> int main()
> {
> int a,b;
> init();
> scanf("%d%d",&a,&b);
> int ans=roudnum(b+1)-roudnum(a);
> printf("%d\n",ans);
> return 0;
> }
Followed by: Post your reply here: |
All Rights Reserved 2003-2013 Ying Fuchen,Xu Pengcheng,Xie Di
Any problem, Please Contact Administrator