#include // clang-format off using Int = long long; #define REP_(i, a_, b_, a, b, ...) for (Int i = (a), lim##i = (b); i < lim##i; i++) #define REP(i, ...) REP_(i, __VA_ARGS__, __VA_ARGS__, 0, __VA_ARGS__) struct SetupIO { SetupIO() { std::cin.tie(nullptr), std::ios::sync_with_stdio(false), std::cout << std::fixed << std::setprecision(13); } } setup_io; #ifndef dump #define dump(...) #endif // clang-format on /** * author: knshnb * created: Fri Jun 12 21:22:41 JST 2020 **/ template T make_vec(S x) { return x; } template auto make_vec(size_t n, Ts... ts) { return std::vector(ts...))>(n, make_vec(ts...)); } template bool chmin(T& a, const T& b) { return a > b ? a = b, true : false; } template bool chmax(T& a, const T& b) { return a < b ? a = b, true : false; } const Int Y = (Int)1e4 + 1; signed main() { Int n; std::cin >> n; std::vector a(n); REP(i, n) std::cin >> a[i]; auto dp = make_vec(n + 1, Y, 0); REP(i, n) { REP(j, Y) { dp[i + 1][j] = dp[i][j] + std::abs(a[i] - j); if (j) chmin(dp[i + 1][j], dp[i + 1][j - 1]); } } std::cout << dp[n][Y - 1] << std::endl; }