Compilare: user.cpp: In function ‘int main()’: user.cpp:77:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j < g[i].size(); ++ j) { ^ user.cpp: In function ‘void getInt(int&)’: user.cpp:36:39: 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, lim, stdin); ^ user.cpp:43:39: 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, lim, stdin); ^ user.cpp: In function ‘int main()’: user.cpp:50:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("piese3.in", "r", stdin); ^