Reverse Number hdoj 1266
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/*
Reverse Number
Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)
Total Submission(s): 5084 Accepted Submission(s): 2371
Problem Description
Welcome to 2006'4 computer college programming contest!
Specially, I give my best regards to all freshmen! You are the future of HDU ACM! And now, I must tell you that ACM problems are always not so easy, but, except this one... Ha-Ha!
Give you an integer; your task is to output its reverse number. Here, reverse number is defined as follows:
1. The reverse number of a positive integer ending without 0 is general reverse, for example, reverse (12) = 21;
2. The reverse number of a negative integer is negative, for example, reverse (-12) = -21;
3. The reverse number of an integer ending with 0 is described as example, reverse (1200) = 2100.
Input
Input file contains multiple test cases. There is a positive integer n (n<100) in the first line, which means the number of test cases, and then n 32-bit integers follow.
Output
For each test case, you should output its reverse number, one case per line.
Sample Input
3
12
-12
1200
Sample Output
21
-21
2100
Author
lcy
Source
HDU 2006-4 Programming Contest
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*/
/*超时*/
/*
#include<stdio.h>
#include<math.h>
#include<stdlib.h>
int main()
{
int T;
scanf("%d",&T);
while(T--)
{
int n,p,i;
scanf("%d",&n);
if(n<0)
{
n=~n+1;
printf("-");
}
int count=0;
while(n%10==0)
{
n/=10;
count++;
}
while(n)
{
p=n%10;
printf("%d",p);
n/=10;
}
for(i=0;i<count;i++)
printf("0");
printf("\n");
}
return 0;
}
*/
/*AC*/
#include<stdio.h>
#include<string.h>
#include<stdlib.h>
#define M 1000
char s[M];
int main()
{
int T;
scanf("%d",&T);
while(T--)
{
scanf("%s",s);
int i,j,len,count=0,p=0;
len=strlen(s);
p=len-1;
while(s[p]=='0') //计算末尾的0的个数
{
count++;
p-=1;
}
if(s[0]=='-')
{
printf("-");
for(i=p;i>0;i--)
printf("%c",s[i]);
}
else
for(i=p;i>=0;i--)
printf("%c",s[i]);
for(j=0;j<count;j++) //不要忘记将末尾的0输出
printf("%c",'0');
printf("\n");
}
return 0;
}
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