字符串和换行符本就是让人头疼的题，此题为何样例#1和其他不一样啊！(“▔□▔)

错的我莫名其妙

  for (int i=1; i<=N; i++){
    for (int j=1; j<=M; j++){
      while(1){
        c=getchar();
        if (c=='H'||c=='P') break;
      }
      ma[i] = (ma[i]<<1)+(c=='H');
    }
  }