Compilare: main.cpp: In function 'void dijkstra()': main.cpp:109:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<edge[1].size(); i++) ~^~~~~~~~~~~~~~~ main.cpp:129:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<edge[next].size(); i++) ~^~~~~~~~~~~~~~~~~~ main.cpp:134:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<aux.size(); i++) ~^~~~~~~~~~~ main.cpp: In member function 'char InParser::read_ch()': main.cpp:16:29: 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); ^