#include <stdio.h>
int multi(int m, int n) {
if(n==0) {
return 0;
} else
return m+multi(m,n-1);
}
int main(void) {
int a,b;
return 0;
}
I2luY2x1ZGUgPHN0ZGlvLmg+CgppbnQgbXVsdGkoaW50IG0sIGludCBuKSB7CglpZihuPT0wKSB7CgkJcmV0dXJuIDA7Cgl9IGVsc2UgCgkJcmV0dXJuIG0rbXVsdGkobSxuLTEpOwp9CgppbnQgbWFpbih2b2lkKSB7CglpbnQgYSxiOwoJc2NhbmYoIiVkIiwmYSk7CglzY2FuZigiJWQiLCZiKTsKCXByaW50ZigiJWQiLCBtdWx0aShhLGIpKTsKCXJldHVybiAwOwp9Cg==