>>760 良い子も悪い子も真似しちゃ駄目w
#include<stdio.h>
void printR_(int n,char*a,char*b){
if(!n)return;
printR_(n/10,a+1,b+1);
switch(n%10){
case 0:break;
case 3:putchar(*a);
case 2:putchar(*a);
case 1:putchar(*a);break;
case 4:putchar(*a);
case 5:putchar(*b);break;
case 6:putchar(*b);putchar(*a);break;
case 7:putchar(*b);putchar(*a);putchar(*a);break;
case 8:putchar(*b);putchar(*a);putchar(*a);putchar(*a);break;
case 9:putchar(*a);putchar(a[1]);break;
}
}
void printR(int n){printR_(n,"IXCM","VLD");}
int main(void){
int i;
for(i=1;i<4000;++i){
printf("%4d: ",i);
printR(i);
printf("\n");
}
return 0;
}