#include <conio.h>
#include <stdio.h>
#include <stdlib.h>
int main()
{
    FILE *f1,*f2;
    f1=fopen("INP.INP","r");
    f2=fopen("OUT.OUT","w");
    int a[800]={0},n,k,dem,tam=0,x,i,j;
    fscanf(f1,"%d%d",&n,&k);
    for(i=0;i<n;i++)
    {
                    dem=0;
                    for(j=0;j<n;j++)
                    {
                                    fscanf(f1,"%d",&x);
                                    if(x>0) dem++;
                                    else dem=0;
                                    
                                    if(dem>=k) { a[j]++; if(a[j]>=k) tam++;}
                                    else a[j]=0;
                    }
    }
    fprintf(f2,"%d",tam);
    fclose(f1);
    fclose(f2);
    return 0;
}
    
     
