/in/foo.cc: In function 'int main()':
/in/foo.cc:19:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(k=0;k<strlen(map[i][j]);k++)
             ~^~~~~~~~~~~~~~~~~~
/in/foo.cc:35:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(k=0;k<strlen(map[i][j]);k++)
             ~^~~~~~~~~~~~~~~~~~
/in/foo.cc:11:27: warning: unused variable 'jin' [-Wunused-variable]
  int n,i,j,num,k,ha,now=0,jin,flag=1;
                           ^~~
/in/foo.cc:11:31: warning: unused variable 'flag' [-Wunused-variable]
  int n,i,j,num,k,ha,now=0,jin,flag=1;
                               ^~~~