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这个故事告诉我们，千万别认为g++是O(N)的！

Posted by fanhqme at 2011-08-01 18:03:13 on Problem 1000
In Reply To:似乎编译是有大概10秒的时间限制的。。。下面这个程序就编译超时了！ Posted by:NeverWin at 2011-08-01 18:01:32

这个代码刚刚编译不超时：

//#warning "haha"
#ifndef x
#define x 0
#include <cstdio>
using namespace std;int main(){int a,b;scanf("%d%d",&a,&b);printf("%d\n",a+b);return 0;}
#endif
#if x==0
#undef x
#define x 1
#include __FILE__
#undef x
#define x 1
#include __FILE__
#undef x
#define x 1
#include __FILE__
#else
#if x==1
#undef x
#define x 2
#include __FILE__
#undef x
#define x 2
#include __FILE__
#undef x
#define x 2
#include __FILE__
#else
#if x==2
#undef x
#define x 3
#include __FILE__
#undef x
#define x 3
#include __FILE__
#undef x
#define x 3
#include __FILE__
#else
#if x==3
#undef x
#define x 4
#include __FILE__
#undef x
#define x 4
#include __FILE__
#undef x
#define x 4
#include __FILE__
#else
#if x==4
#undef x
#define x 5
#include __FILE__
#undef x
#define x 5
#include __FILE__
#undef x
#define x 5
#include __FILE__
#else
#if x==5
#undef x
#define x 6
#include __FILE__
#undef x
#define x 6
#include __FILE__
#undef x
#define x 6
#include __FILE__
#else
#if x==6
#undef x
#define x 7
#include __FILE__
#undef x
#define x 7
#include __FILE__
#undef x
#define x 7
#include __FILE__
#else
#if x==7
#undef x
#define x 8
#include __FILE__
#undef x
#define x 8
#include __FILE__
#undef x
#define x 8
#include __FILE__
#else
#if x==8
#undef x
#define x 9
#include __FILE__
#undef x
#define x 9
#include __FILE__
//#undef x
//#define x 9
//#include __FILE__
#else
#if x==-9
#undef x
#define x 10
#include __FILE__
#undef x
#define x 10
#include __FILE__
#undef x
#define x 10
#include __FILE__
#else
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif
#endif

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Content:

> 这个代码刚刚编译不超时：
> 
> //#warning "haha"
> #ifndef x
> #define x 0
> #include <cstdio>
> using namespace std;int main(){int a,b;scanf("%d%d",&a,&b);printf("%d\n",a+b);return 0;}
> #endif
> #if x==0
> #undef x
> #define x 1
> #include __FILE__
> #undef x
> #define x 1
> #include __FILE__
> #undef x
> #define x 1
> #include __FILE__
> #else
> #if x==1
> #undef x
> #define x 2
> #include __FILE__
> #undef x
> #define x 2
> #include __FILE__
> #undef x
> #define x 2
> #include __FILE__
> #else
> #if x==2
> #undef x
> #define x 3
> #include __FILE__
> #undef x
> #define x 3
> #include __FILE__
> #undef x
> #define x 3
> #include __FILE__
> #else
> #if x==3
> #undef x
> #define x 4
> #include __FILE__
> #undef x
> #define x 4
> #include __FILE__
> #undef x
> #define x 4
> #include __FILE__
> #else
> #if x==4
> #undef x
> #define x 5
> #include __FILE__
> #undef x
> #define x 5
> #include __FILE__
> #undef x
> #define x 5
> #include __FILE__
> #else
> #if x==5
> #undef x
> #define x 6
> #include __FILE__
> #undef x
> #define x 6
> #include __FILE__
> #undef x
> #define x 6
> #include __FILE__
> #else
> #if x==6
> #undef x
> #define x 7
> #include __FILE__
> #undef x
> #define x 7
> #include __FILE__
> #undef x
> #define x 7
> #include __FILE__
> #else
> #if x==7
> #undef x
> #define x 8
> #include __FILE__
> #undef x
> #define x 8
> #include __FILE__
> #undef x
> #define x 8
> #include __FILE__
> #else
> #if x==8
> #undef x
> #define x 9
> #include __FILE__
> #undef x
> #define x 9
> #include __FILE__
> //#undef x
> //#define x 9
> //#include __FILE__
> #else
> #if x==-9
> #undef x
> #define x 10
> #include __FILE__
> #undef x
> #define x 10
> #include __FILE__
> #undef x
> #define x 10
> #include __FILE__
> #else
> #endif
> #endif
> #endif
> #endif
> #endif
> #endif
> #endif
> #endif
> #endif
> #endif

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