#include <stdio.h>
void main(){
    int i, j, s=0;
    for(i=1; i<10; i++){  //i=1~9
        for (j=1; j<10; j++){  //j=1~9
            if(j%2==0) continue; //j=1,3,5,7,9 s++ 5회
            if(i%3==0) continue; //i=3,6,9
            if(i%4==0) break;    //i=4,8
            s++;
        }
    }
    printf("%d\n", s);  //5+5+0+0+5+0+5+0+0=20
}

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