Accepted
/in/foo.cc: In function 'void dfs(int)':
/in/foo.cc:10:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i = 0; i < edges[u].size(); ++i) {
~~^~~~~~~~~~~~~~~~~
/in/foo.cc: In function 'void dfs(int)':
/in/foo.cc:10:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i = 0; i < edges[u].size(); ++i) {
~~^~~~~~~~~~~~~~~~~
