#include <stdio.h>
inline int abs(const int &a)
{ return a>0?a:-a; }
int a,p,e,i,d,ans;
int main()
{
    int ncase=1;
    while(scanf("%d%d%d%d",&p,&e,&i,&d) && !(p==-1&&e==-1&&i==-1&&d==-1))
    {
        if(p==e && p==i)
        {
            ans = 21252 + e - d;
            if(e>d)
                ans = e-d;
            printf("Case %d: the next triple peak occurs in %d days.\n",ncase++,ans);
            continue;
        }    
        for(a=(d-p)/23-1; a<=924; a++)
            if((23*a+p>d && abs(23*a+p-e)%28==0 && abs(23*a+p-i)%33==0))
                break;
        ans = 23 * a + p - d; 
        if(ans>21252)
            ans -= 21252;
        if(ans<=0)
            ans += 21252;
        printf("Case %d: the next triple peak occurs in %d days.\n",ncase++,ans);
    }  
    return 0;
}    

• nnd，把一堆保护都删掉就AC了， 真是画蛇添足 (891) sunmoonstar_love 2005-08-21 16:02:33