求绝对值
Time Limit : 2000/1000ms (Java/Other) Memory Limit : 65536/32768K (Java/Other)
Total Submission(s) : 1114 Accepted Submission(s) : 531

Problem Description

求实数的绝对值。

Input

输入数据有多组，每组占一行，每行包含一个实数。

Output

对于每组输入数据，输出它的绝对值，要求每组数据输出一行，结果保留两位小数。

Sample Input

123
-234.00

Sample Output

123.00
234.00
一道简单的题！可是我这么写总是wrong answer 这是为什么呀？
#include <stdio.h>

int main()
{
float a;

while(scanf("%f", &a) != EOF)
a > 0 ?printf("%.2f\n",a) : printf("%.2f\n", -a);

return 0;
}

上面的把float改为double就过了！
A == B ?
Time Limit : 1000/1000ms (Java/Other) Memory Limit : 32768/32768K (Java/Other)
Total Submission(s) : 685 Accepted Submission(s) : 89

Problem Description

Give you two numbers A and B, if A is equal to B, you should print "YES", or print "NO".

Input

each test case contains two numbers A and B.

Output

for each case, if A is equal to B, you should print "YES", or print "NO".

Sample Input

1 2
2 2
3 3
4 3
Sample Output

NO
YES
YES
NO
可是这道题又是哪里错了呢！Output Limit Exceeded这个是这个错误！
#include <stdio.h>
#include <math.h>

int main()
{
unsigned long a, b;

while(scanf("%lu%lu", &a, &b) != EOF)
{
a - b == 0 ? printf("YES\n"):printf("NO\n");
}

return 0;
}