Accepted
/in/foo.cc: In function 'int main()':
/in/foo.cc:7:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 1; i <= s.length(); i++){
~~^~~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:7:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for(int i = 1; i <= s.length(); i++){
~~^~~~~~~~~~~~~
