sgu 115 Calendar

#include <stdio.h>#include <string.h>#include <math.h>using namespace std;int month[13]={0,31,28,31,30,31,30,31,31,30,31,30,31};int main(){    int i,n,m,t=0;    for(i=1;i<=9;i++)        t+=month[i];    t+=21;    while(scanf("%d%d",&n,&m)!=EOF)    {        if(m<=0||m>12)            printf("Impossible\n");        else        {            if(month[m]<n)                printf("Impossible\n");            else            {                int s=0;                for(i=1;i<m;i++)                    s+=month[i];                s+=n;                s=s-t+700;                if(s%7==0)                    printf("7\n");                else                    printf("%d\n",s%7);            }        }    }    return 0;}