$O(n)$
#include<cstdio> long long r; int n, a[1000], c; int main() { scanf("%d", &n); for (int i = 0; i < n; i++) scanf("%d", a + i); scanf("%d", &c); for (int i = 0; i < n; i++) if (a[i]) r += (a[i] - 1) / c*c + c; printf("%lld", r); return 0; }
#include<cstdio> long long r; int n, a[1000], c; int main() { scanf("%d", &n); for (int i = 0; i < n; i++) scanf("%d", a + i); scanf("%d", &c); for (int i = 0; i < n; i++) if (a[i]) r += (a[i] - 1) / c*c + c; printf("%lld", r); return 0; }
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