#include int ack(int m, int n); int main(void){ int m,n; scanf("%d %d",&m,&n); printf("%d\n",ack(m,n)); return 0; } int ack(int m, int n){ if(!n) return ack(m-1,1); else if(!m) return n+1; else return ack(m-1,ack(m,n-1)); }