Compilare: user.cpp: In function ‘int main()’: user.cpp:11:35: warning: unused variable ‘l’ [-Wunused-variable] int n, d, k = 2000000000, i, j, l, min, max; ^ user.cpp:11:38: warning: unused variable ‘min’ [-Wunused-variable] int n, d, k = 2000000000, i, j, l, min, max; ^~~ user.cpp:11:43: warning: unused variable ‘max’ [-Wunused-variable] int n, d, k = 2000000000, i, j, l, min, max; ^~~ user.cpp:9:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("slidingwindow.in", "r", stdin); ^ user.cpp:10:44: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("slidingwindow.out", "w", stdout); ^ user.cpp:12:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &d); ^ user.cpp:14:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &sir[i]); ^