Compilare: user.cpp: In function ‘int main()’: user.cpp:17:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:25:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &n); ^ user.cpp:31:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i]); ^ user.cpp:75:19: warning: iteration 1000u invokes undefined behavior [-Waggressive-loop-optimizations] if (last[i] == t) ^ user.cpp:73:5: note: containing loop for (int i=1; i<= 1000000; i++) ^ user.cpp:66:19: warning: iteration 1000u invokes undefined behavior [-Waggressive-loop-optimizations] if (last[i] == t) ^ user.cpp:64:5: note: containing loop for (int i=1; i<= 1000000; i++) ^