UVa 213，World Finals 1991，信息解码

#include <stdio.h>
#include <string.h>

int code[8][1<<8];

int readchar()
{
    for(;;)
    {
        int ch = getchar();
        if(ch != ‘\n‘ && ch != ‘\r‘) return ch;
    }
}


int readint(int c) {
  int v = 0;
  while(c--) v = v * 2 + readchar() - ‘0‘;
  return v;
}


int readcode()
{
    memset(code,0,sizeof(code));
    code[1][0] = readchar();
    for(int i = 2; i<=7; i++)
    {
        for(int j=0; j<(1<<i)-1; j++)
        {
            int ch = getchar();
            if(ch==EOF) return 0;
            if(ch==‘\n‘||ch==‘\r‘) return 1;
            code[i][j] = ch;
        }
    }
    return 1;
}

void printcodes()
{
    for(int len = 1; len <= 3; len++)
        for(int i = 0; i < (1<<len)-1; i++)
        {
            if(code[len][i] == 0) return;
            printf("code[%d][%d] = %c\n", len, i, code[len][i]);
        }
}


int main()
{
    //freopen("input.txt","r",stdin);
    while(readcode())
    {
        while(true)
        {
            int len = readint(3);
            if(len == 0) break;
            while(true)
            {
                int v = readint(len);
                if(v == (1 << len)-1) break;
                putchar(code[len][v]);
            }
        }
        putchar(‘\n‘);
    }
    return 0;
}