Compilare: user.cpp: In function ‘int main()’: user.cpp:54:25: warning: unused variable ‘X’ [-Wunused-variable] for (int i = 1, X, Y; i <= M; i++) ^ user.cpp:54:28: warning: unused variable ‘Y’ [-Wunused-variable] for (int i = 1, X, Y; i <= M; i++) ^ user.cpp:46:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &N, &M); ^ user.cpp:50:30: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &Val); ^ user.cpp:56:43: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &start, &finish); ^