Compilare: main.cpp: In function 'void dfs(int)': main.cpp:48:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < g[x].size(); i++) ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:67:4: warning: this 'else' clause does not guard... [-Wmisleading-indentation] else c += (ch - 'A' + 1) * k; k *= 5; ^~~~ main.cpp:67:34: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'else' else c += (ch - 'A' + 1) * k; k *= 5; ^