emptyCell

#include <stdio.h>

int main() {
    int arr[3][3]={0},i,j,r,temp;
    scanf("%d",&r);
    temp=r;
    while(temp--){
        int x,y;
        scanf("%d%d",&x,&y);
        arr[x-1][y-1]=1;
    }
    printf("Total empty cells - %d\n",9-r);
    for(i=0;i<3;++i){
        for(j=0;j<3;++j){
            if(arr[i][j]==0){
                printf("%d %d\n",i+1,j+1);
            }
        }
    }
    return 0;
}