poj 3893 Hard

#include <iostream>#include <stdio.h>#include <string.h>using namespace std;char  str[10100];int v[10100]={0,1,2,3};int main(){    int i,strnum,end,start;    while(scanf("%d%s%d",&end,str,&start)!=EOF)    {       strnum=strlen(str);       start=v[start];       for(i=strnum-1;i>=0;i--)       {if(str[i]=='f'){    if(start&1)//判断奇偶    {      start++;    }    else    {        start=start+3;    }}else if(str[i]=='k'){   printf("%dn",start);}else if(str[i]=='b'){    start=start-2;}else if(str[i]=='<'){    v[end]=start;}else if(str[i]=='='){    if(v[end]==start)    {        printf("=n");    }    else    printf("#n");}       }    }    return 0;}