Wrong Answer
/in/foo.cc: In function 'bool dbs(char*)':
/in/foo.cc:5:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
while(i!=strlen(a)){
~^~~~~~~~~~~
/in/foo.cc: In function 'bool dbs(char*)':
/in/foo.cc:5:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
while(i!=strlen(a)){
~^~~~~~~~~~~
