Wrong Answer
/in/foo.cc: In function 'int main()':
/in/foo.cc:107:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i = 1; i < T.size(); i++)
~~^~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:107:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i = 1; i < T.size(); i++)
~~^~~~~~~~~~
