Compilare: main.cpp: In function 'int bellman_ford(int)': main.cpp:71:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < edges[node.fx].size(); i++){ ~~^~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'void Read(int&)': main.cpp:34:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, MAX, 1, IN), pos = 0; ^ main.cpp:39:42: warning: ignoring return value of 'size_t fread(void*, size_t, size_t, FILE*)', declared with attribute warn_unused_result [-Wunused-result] fread(f, MAX, 1, IN), pos = 0; ^