大牛们，帮帮忙，测试了很多数据都没有问题，不知道为什么WA，还有就是用G++时编译出错，也不知道什么原因，用C++就WA
代码如下：
#include <iostream>
#include <cstdio>

using namespace std;

__int64 s[20] = {0,9, 18, 108, 198, 1098, 1998, 10998, 19998, 109998, 199998, 
1099998, 1999998, 10999998, 19999998, 109999998, 
199999998, 1099999998, 1999999998, 10999999998
};

void inttochar (char a[], __int64 x)
{
	int i,t;
	for (i = 0; ; i++)
	{
		t = x % 10;
		a[i] = t + '0';
		x = x / 10;
		if (x == 0)
			break;
	}
	a[i + 1] = '\0';
}

int main ()
{
//	freopen ("2402.txt","r",stdin);
	__int64 k,t,tmp;
	int i,j,r,mid;
	char a[22];
	while (1)
	{
		scanf ("%I64d",&k);
		if (k == 0)
			break;
		for (i = 1; ; i++)
			if (k < s[i])
				break;
		if (i == 1)
			printf ("%I64d\n",k);
		else
		{
			t = k - s[i - 1];
			if (t == 0)	
			{
				for (j = 0; j < i - 1; j++)
						printf ("9");
					printf ("\n");
			}
			else
			{
				if (i % 2 == 0)
				{
					r = i / 2;
					switch (r)
					{
					case 1:
						printf ("%I64d",t);
						printf ("%I64d",t);
						break;
					case 2:
						printf ("%I64d",t + 9);
						inttochar (a,t + 9);
						printf ("%s",a);
						break;
					case 3:
						printf ("%I64d",t + 99);
						inttochar (a,t + 99);
						printf ("%s",a);
						break;
					case 4:
						printf ("%I64d",t + 999);
						inttochar (a,t + 999);
						printf ("%s",a);
						break;
					case 5:
						printf ("%I64d",t + 9999);
						inttochar (a,t + 9999);
						printf ("%s",a);
						break;
					case 6:
						printf ("%I64d",t + 99999);
						inttochar (a,t + 99999);
						printf ("%s",a);
						break;
					case 7:
						printf ("%I64d",t + 999999);
						inttochar (a,t + 999999);
						printf ("%s",a);
						break;
					case 8:
						printf ("%I64d",t + 9999999);
						inttochar (a,t + 9999999);
						printf ("%s",a);
						break;
					case 9:
						printf ("%I64d",t + 99999999);
						inttochar (a,t + 99999999);
						printf ("%s",a);
						break;
					case 10:
						printf ("%I64d",t + 999999999);
						inttochar (a,t + 999999999);
						printf ("%s",a);
						break;
					}
					printf ("\n");
				}
				else
				{
					r = i / 2;
					mid = (t - 1) % 10;
					tmp = (t - 1) / 10 + 1;
					switch (r)
					{
					case 1:
						printf ("%I64d",tmp);
						printf ("%d",mid);
						printf ("%I64d",tmp);
						break;
					case 2:
						printf ("%I64d",tmp + 9);
						printf ("%d",mid);
						inttochar (a,tmp + 9);
						printf ("%s",a);
						break;
					case 3:
						printf ("%I64d",tmp + 99);
						printf ("%d",mid);
						inttochar (a,tmp + 99);
						printf ("%s",a);
						break;
					case 4:
						printf ("%I64d",tmp + 999);
						printf ("%d",mid);
						inttochar (a,tmp + 999);
						printf ("%s",a);
						break;
					case 5:
						printf ("%I64d",tmp + 9999);
						printf ("%d",mid);
						inttochar (a,tmp + 9999);
						printf ("%s",a);
						break;
					case 6:
						printf ("%I64d",tmp + 99999);
						printf ("%d",mid);
						inttochar (a,99999);
						printf ("%s",a);
						break;
					case 7:
						printf ("%I64d",tmp + 999999);
						printf ("%d",mid);
						inttochar (a,tmp + 999999);
						printf ("%s",a);
						break;
					case 8:
						printf ("%I64d",tmp + 9999999);
						printf ("%d",mid);
						inttochar (a,tmp + 9999999);
						printf ("%s",a);
						break;
					case 9:
						printf ("%I64d",tmp + 99999999);
						printf ("%d",mid);
						inttochar (a,tmp + 99999999);
						printf ("%s",a);
						break;
					case 10:
						printf ("%I64d",tmp + 999999999);
						printf ("%d",mid);
						inttochar (a,tmp + 999999999);
						printf ("%s",a);
						break;
					}
					printf ("\n");
				}
			}
		}
	}
	return 0;
}

• Re:无语了，WA了N次，不知道什么原因，测试很多情况都过了啊 (48) lironghua 2008-04-27 08:52:35
• Re:无语了，WA了N次，不知道什么原因，测试很多情况都过了啊 (4171) 1207020203 2013-05-15 01:25:14