Compilare: user.cpp: In function ‘int main()’: user.cpp:23:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &t); ^ user.cpp:26:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld", &n); ^ user.cpp:31:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%lld", &x, &y); ^ user.cpp:28:44: warning: iteration 56u invokes undefined behavior [-Waggressive-loop-optimizations] for(LL j = 1; j< VMAX; j++) d[0][j] = inf; ^ user.cpp:28:3: note: containing loop for(LL j = 1; j< VMAX; j++) d[0][j] = inf; ^