/in/foo.cc: In function 'void dfs(int, int)':
/in/foo.cc:63:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int i=0;i<g[x].size();i++) {
~^~~~~~~~~~~~
/in/foo.cc: In function 'int main()':
/in/foo.cc:108:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int j=0;j<g[b].size();j++) {
~^~~~~~~~~~~~
/in/foo.cc:126:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int j=0;j<g[a].size();j++) {
~^~~~~~~~~~~~
/in/foo.cc:144:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
for (int j=0;j<g[f].size();j++) {
~^~~~~~~~~~~~