Compilare: main.cpp: In function 'int BFS(int, int)': main.cpp:141:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<vec[x].size(); j++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int Get_Flux(int, int)': main.cpp:165:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j=0; j<vec[destinatie].size(); j++) ~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:220:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<da.size(); i++) ~^~~~~~~~~~ main.cpp: In function 'char read_ch()': main.cpp:27:33: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(_in_buff, 1, 4096, _fin); ^