Compilare: user.cpp: In function ‘int main()’: user.cpp:32:23: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int tmp = (sz[top] + 1 >> 1) + (sz[top - 1] + 1 >> 1) - (sz[top] + sz[top - 1] + 1 >> 1); ^ user.cpp:32:48: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int tmp = (sz[top] + 1 >> 1) + (sz[top - 1] + 1 >> 1) - (sz[top] + sz[top - 1] + 1 >> 1); ^ user.cpp:32:83: warning: suggest parentheses around ‘+’ inside ‘>>’ [-Wparentheses] int tmp = (sz[top] + 1 >> 1) + (sz[top - 1] + 1 >> 1) - (sz[top] + sz[top - 1] + 1 >> 1); ^ user.cpp:23:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ktown.in", "r", stdin); ^ user.cpp:24:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ktown.out", "w", stdout); ^ user.cpp:26:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &k); ^ user.cpp:28:71: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (int i = 1; i <= n; i++)scanf("%lld", &a[i]), a[i] -= 1LL * k * i; ^