zoj 1143 Date Bugs

#include<cstdio>#include<cstring>using namespace std;int a[25],b[25],y[25],x[10000];int main(){    int n,cas=1,flag;    while(scanf("%d",&n)&&n)    {        memset(x,0,sizeof(x));        int minn=0;        flag=0;        for(int i=0;i<n;i++)        { scanf("%d%d%d",&y[i],&a[i],&b[i]); b[i]-=a[i]; y[i]=y[i]%b[i]; for(;y[i]<10000;y[i]+=b[i])     x[y[i]]++; if(a[i]>minn)     minn=a[i];        }        printf("Case #%d:n",cas++);        for(int i=minn;i<10000;i++)        { if(x[i]==n) {     flag=1;     printf("The actual year is %d.nn",i);     break; }        }        if(!flag) printf("Unknown bugs detected.nn");    }    return 0;}