結果
問題 | No.1297 銅像 |
ユーザー | satashun |
提出日時 | 2021-01-07 18:13:40 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
AC
|
実行時間 | 135 ms / 2,000 ms |
コード長 | 3,662 bytes |
コンパイル時間 | 2,294 ms |
コンパイル使用メモリ | 208,504 KB |
実行使用メモリ | 18,816 KB |
最終ジャッジ日時 | 2024-11-09 00:44:16 |
合計ジャッジ時間 | 5,542 ms |
ジャッジサーバーID (参考情報) |
judge2 / judge1 |
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テストケース
テストケース表示入力 | 結果 | 実行時間 実行使用メモリ |
---|---|---|
testcase_00 | AC | 2 ms
5,248 KB |
testcase_01 | AC | 2 ms
5,248 KB |
testcase_02 | AC | 2 ms
5,248 KB |
testcase_03 | AC | 2 ms
5,248 KB |
testcase_04 | AC | 2 ms
5,248 KB |
testcase_05 | AC | 2 ms
5,248 KB |
testcase_06 | AC | 5 ms
5,248 KB |
testcase_07 | AC | 6 ms
5,248 KB |
testcase_08 | AC | 5 ms
5,248 KB |
testcase_09 | AC | 118 ms
18,304 KB |
testcase_10 | AC | 127 ms
18,816 KB |
testcase_11 | AC | 73 ms
9,728 KB |
testcase_12 | AC | 75 ms
9,600 KB |
testcase_13 | AC | 86 ms
16,896 KB |
testcase_14 | AC | 71 ms
9,472 KB |
testcase_15 | AC | 70 ms
9,728 KB |
testcase_16 | AC | 73 ms
9,600 KB |
testcase_17 | AC | 67 ms
9,472 KB |
testcase_18 | AC | 68 ms
9,984 KB |
testcase_19 | AC | 135 ms
18,816 KB |
testcase_20 | AC | 50 ms
6,400 KB |
testcase_21 | AC | 51 ms
6,400 KB |
testcase_22 | AC | 69 ms
9,600 KB |
ソースコード
#include <bits/stdc++.h> using namespace std; using ll = long long; using pii = pair<int, int>; template <class T> using V = vector<T>; template <class T> using VV = V<V<T>>; #define pb push_back #define eb emplace_back #define mp make_pair #define fi first #define se second #define rep(i, n) rep2(i, 0, n) #define rep2(i, m, n) for (int i = m; i < (n); i++) #define per(i, b) per2(i, 0, b) #define per2(i, a, b) for (int i = int(b) - 1; i >= int(a); i--) #define ALL(c) (c).begin(), (c).end() #define SZ(x) ((int)(x).size()) constexpr ll TEN(int n) { return (n == 0) ? 1 : 10 * TEN(n - 1); } template <class T, class U> void chmin(T& t, const U& u) { if (t > u) t = u; } template <class T, class U> void chmax(T& t, const U& u) { if (t < u) t = u; } template <class T, class U> ostream& operator<<(ostream& os, const pair<T, U>& p) { os << "(" << p.first << "," << p.second << ")"; return os; } template <class T> ostream& operator<<(ostream& os, const vector<T>& v) { os << "{"; rep(i, v.size()) { if (i) os << ","; os << v[i]; } os << "}"; return os; } #ifdef LOCAL void debug_out() { cerr << endl; } template <typename Head, typename... Tail> void debug_out(Head H, Tail... T) { cerr << " " << H; debug_out(T...); } #define debug(...) \ cerr << __LINE__ << " [" << #__VA_ARGS__ << "]:", debug_out(__VA_ARGS__) #define dump(x) cerr << __LINE__ << " " << #x << " = " << (x) << endl #else #define debug(...) (void(0)) #define dump(x) (void(0)) #endif // modified // https://github.com/kth-competitive-programming/kactl/blob/master/content/data-structures/LineContainer.h // lines : y = kx + m // find maximum at x struct Line { mutable ll k, m, p; bool operator<(const Line& o) const { return k < o.k; } bool operator<(ll x) const { return p < x; } }; template <bool maximum> struct LineContainer : multiset<Line, less<>> { // (for doubles, use inf = 1/.0, div(a,b) = a/b) static const ll inf = LLONG_MAX; ll div(ll a, ll b) { // floored division return a / b - ((a ^ b) < 0 && a % b); } bool isect(iterator x, iterator y) { if (y == end()) return x->p = inf, 0; if (x->k == y->k) x->p = x->m > y->m ? inf : -inf; else x->p = div(y->m - x->m, x->k - y->k); return x->p >= y->p; } void add(ll k, ll m) { if (!maximum) k = -k, m = -m; auto z = insert({k, m, 0}), y = z++, x = y; while (isect(y, z)) z = erase(z); if (x != begin() && isect(--x, y)) isect(x, y = erase(y)); while ((y = x) != begin() && (--x)->p >= y->p) isect(x, erase(y)); } ll query(ll x) { assert(!empty()); auto l = *lower_bound(x); auto res = l.k * x + l.m; if (!maximum) res = -res; return res; } }; const ll INF = TEN(18); int main() { cin.tie(nullptr); ios::sync_with_stdio(false); int N; ll C; cin >> N >> C; V<ll> a(N), b(N); rep(i, N) cin >> a[i] >> b[i]; V<ll> dp(N + 1, INF), sub(N + 1, INF); dp[0] = 0; LineContainer<false> ls, ld; rep(i, N) { ls.add(-i, C * i * i + dp[i] * 2); sub[i + 1] = ls.query((2 * i + 1) * C + 2 * a[i]); if (i) { ld.add(-i * C + a[i - 1], -(i - 1) * a[i - 1] + C * i * (i - 3) / 2 + sub[i]); dp[i + 1] = ld.query(i) + C * (i + 1) * (i + 2) / 2; } sub[i + 1] = sub[i + 1] / 2 + b[i] + a[i] * (i + 1) + C * i * (i + 1) / 2; chmin(dp[i + 1], sub[i + 1]); } debug(dp); debug(sub); cout << dp[N] << endl; return 0; }