Compilare: user.cpp: In function ‘int main()’: user.cpp:36:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i = 0; i < G[prim].size(); i++) ^ user.cpp:18:12: warning: unused variable ‘j’ [-Wunused-variable] int i, j; ^ user.cpp:20:34: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d %d", &n, &m); ^ user.cpp:23:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf (fin, "%d %d %d", &x, &y, &c); ^