Compilare: main.cpp: In function 'void printmap(int)': main.cpp:104:25: warning: variable 'it2' set but not used [-Wunused-but-set-variable] map<int,ll>::iterator it2 = mpsum[node].begin(); ^~~ main.cpp: In function 'void dfs(int, int, int)': main.cpp:109:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0;h < g[node].size(); h++){ ~~^~~~~~~~~~~~~~~~ main.cpp:120:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int h = 0; h < g[node].size(); h++){ ~~^~~~~~~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:19:29: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(buff, 1, 4096, fin); ^