#include<stdio.h>
#include<math.h>
void main()
  {
   int n1, n2,n3,a[80],b[80],c[80],d1[80],d,i=0,count=0;
  for(;;)
     { scanf("%d%d%d%d%d",&a[i],&b[i],&c[i],&d1[i]);
       if( a[i]==-1&&b[i]==-1&&c[i]==-1&&d1[i]==-1 )  break;
       i++;count++;
     }
    for(i=0;i<count;i++)
     { n1=d1[i]/23;n2=d1[i]/28;n3=d1[i]/33;
       if(33*n3+c[i]<=d1[i]) n3++;
       if(28*n2+b[i]<=d1[i]) n2++;
       if(23*n1+a[i]<=d1[i]) n1++;
       while(33*n3+c[i]<=21252)
           { if( (23*n1+a[i])==(28*n2+b[i])&&(33*n3+c[i])==(28*n2+b[i]) )
               {d=33*n3+c[i]-d1[i];break;}
             while( abs(33*n3+c[i]-23*(n1+1)-a[i])<=33 )
               {  while( abs(33*n3+c[i]-28*(n2+1)-b[i])<=33 )
                    { n2++;
                      if( (23*n1+a[i])==(28*n2+b[i])&&(33*n3+c[i])==(28*n2+b[i]) )
                          {d=33*n3+c[i]-d1[i];break;}
                    }
                  n1++;
                }
              n3++;
            }
        printf("Case %d: the next triple peak occurs in %d days.\n",i+1,d);
      }
   }


有一组数据通不过,不知怎么回事....