Compilare: main.cpp: In function 'void Dijkstra(int)': main.cpp:55:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[node].size(); ++i) { ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'void DFS(int, int, int)': main.cpp:75:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[x].size(); ++i) { ~~^~~~~~~~~~~~~ main.cpp: In function 'void read(int&)': main.cpp:15:52: 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, DIM, in), poz = 0; } ^ main.cpp:19:52: 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, DIM, in), poz = 0; } ^ main.cpp: In function 'int main()': main.cpp:86:42: 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, DIM, in), poz = 0; ^