Compilare: user.cpp: In function ‘int main()’: user.cpp:9:47: warning: variable ‘lg’ set but not used [-Wunused-but-set-variable] int n, m, k, i, l, x, y, steag, nod, fiu, lg; ^~ user.cpp:15:27: 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:18:27: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d", &x, &y); ^