OJ Board

I am trying this problem again and again .But I cannot find error in this code .Why WA ?? Please help ...

#include<iostream>
#include<cstdio>
#include<cmath>
#include <algorithm>
using namespace std;

#define PI 3.14159265


class CM
{
public:
double x,y;
bool operator<(const CM &c)const
{
if ...

Hi, I could not find any bug in this code . Please help me .Why this code is not accepted By ACM ?

#include<iostream>
#include<string>
using namespace std;

int getValue(char ch)
{
if(ch>='0' && ch<='9')
return ch-'0';
else if(ch>='A' && ch<='Z')
return ch-'A'+10;
else
return ch-'a'+36 ...