Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:56:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1;i < verify.size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:61:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0; h < g[node].size(); h++){ ~~^~~~~~~~~~~~~~~~ main.cpp:65:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < verify.size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfs2(int, int)': main.cpp:72:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0; h < g[node].size(); h++){ ~~^~~~~~~~~~~~~~~~ main.cpp:75:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1;i < verify.size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'long long int solve(int)': main.cpp:106:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < verify.size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:115:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size(); i++){ ~~^~~~~~~~~~~~