/in/foo.cc: In function 'int main()':
/in/foo.cc:19:9: warning: statement has no effect [-Wunused-value]
     b[i]==0;
     ~~~~^~~
/in/foo.cc:6:23: warning: unused variable 't' [-Wunused-variable]
  int a[m+9],cnt=0,k=0,t=0,i=0,I=1;//cnt表示出局人数 k表示计数
                       ^