Compilare: user.cpp: In function ‘int main()’: user.cpp:17:32: 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:12:18: warning: ‘q’ may be used uninitialized in this function [-Wmaybe-uninitialized] int n, m, k, q, l; ^