> 为什么这段代码在实践中可以得到正确结果，但是却会有wrong answer的宿命？
> 小弟第一次来，请各位伟人帮助！
> 
> 
> 
> #include <iostream>
> #include <vector>
> using namespace std;
> const int p_cycle=23,e_cycle=28,i_cycle=33;
> inline void calc(int p, int e, int i, int d)
> {
> 	static int nth=0;
> 	nth++;
> 	p%=p_cycle;
> 	e%=e_cycle;
> 	i%=i_cycle;
> 	int first;
> 	for(int ne=1;ne<=p_cycle*i_cycle;ne++)
> 	for(int np=1;np<=e_cycle*i_cycle;np++)
> 	  if(e+ne*e_cycle==p+np*p_cycle)
> 		for(int ni=1;ni<=e_cycle*p_cycle;ni++)
> 		if(p+np*p_cycle==i+ni*i_cycle)
>  		{first=p+np*p_cycle;break;}
> 	cout<<"Case "<<nth
>         <<": the next triple peak occurs in "<<first-d
>         <<" days.\n";
> }
> int main()
> {
> 	int acount=0;
> 	int p,e,i,d;
> 	vector<int> data;
> 	while(1)
> 	{
> 		cin>>p>>e>>i>>d;
> 		if(p==-1&&e==-1&&i==-1&&d==-1)break;
> 		acount++;
> 		data.push_back(p);
> 		data.push_back(e);
> 		data.push_back(i);
> 		data.push_back(d);
> 	}
> 	int x;
> 	for (int n=0;n<acount;n++)
> 	{
> 		x=n<<2;
> 		calc(data[x],data[x+1],data[x+2],data[x+3]);
> 	}
> 	return 0;
> }
我上次days后面缺个点都判我WA