zoj 3163 Apple Pile

#include<iostream>#include<stdio.h>#include<string.h>#include<stdlib.h>#include<math.h>#include<queue>#include<stack>#include<vector>#include<algorithm>#include <iomanip>using namespace std;#define lim 81#define len sizeof(struct p)struct p{int r,num;};char a[lim][lim];int main (){int i,j,x,y,m,n;while (scanf("%d%d%d",&m,&x,&y)!=EOF){m=(m-1>0?m-1:0);printf("%dn",m);}return 0;}