Compilare: main.cpp: In function 'int main()': main.cpp:87:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < Edges.size() && nrm < i - 1; j++){ ~~^~~~~~~~~~~~~~ main.cpp:65:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("desen.out", "w", stdout); ^ main.cpp: In function 'void Read(int&)': main.cpp:28:42: 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:33:42: 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; ^