結果
| 問題 |
No.484 収穫
|
| コンテスト | |
| ユーザー |
arktan763
|
| 提出日時 | 2020-06-03 13:53:20 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
AC
|
| 実行時間 | 93 ms / 3,000 ms |
| コード長 | 6,662 bytes |
| コンパイル時間 | 2,228 ms |
| コンパイル使用メモリ | 195,084 KB |
| 最終ジャッジ日時 | 2025-01-10 20:51:48 |
|
ジャッジサーバーID (参考情報) |
judge1 / judge2 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 21 |
ソースコード
#include <bits/stdc++.h>
using namespace std;
// #define int long long
// #define double long double
#define FOR(i, a, b) for(int i = (a); i < (b); ++i)
#define FORR(i, a, b) for(int i = (a); i > (b); --i)
#define REP(i, n) for(int i = 0; i < (n); ++i)
#define REPR(i, n) for(int i = n; i >= 0; i--)
#define FOREACH(x, a) for(auto &(x) : (a))
#define VECCIN(x) \
for(auto &youso_ : (x)) cin >> youso_
#define bitcnt(x) __builtin_popcount(x)
#define lbit(x) __builtin_ffsll(x)
#define rbit(x) (64 - __builtin_clzll(x))
#define fi first
#define se second
#define All(a) (a).begin(), (a).end()
#define rAll(a) (a).rbegin(), (a).rend()
#define sz(s) (ll) s.size()
#define cinfast() cin.tie(0), ios::sync_with_stdio(false)
#define debug(x) cerr << #x << " = " << (x) << endl;
#define loop(x) \
LCIN(loop); \
while(loop--) { \
x; \
}
#define PERM(c) \
sort(All(c)); \
for(bool cp = true; cp; cp = next_permutation(All(c)))
#define COMB(n, k) \
for(ll bit = (1LL << k) - 1; bit < (1LL << n); bit = next_combination(bit))
#define PERM2(n, k) \
COMB(n, k) { \
vector<int> sel; \
for(int bitindex = 0; bitindex < n; bitindex++) \
if(bit >> bitindex & 1) sel.emplace_back(bitindex); \
PERM(sel) { Printv(sel); } \
}
#define MKORDER(n) \
vector<int> od(n); \
iota(All(od), 0LL);
template <typename T = long long> inline T IN() {
T x;
cin >> x;
return (x);
}
inline void CIN() {}
template <class Head, class... Tail>
inline void CIN(Head &&head, Tail &&... tail) {
cin >> head;
CIN(move(tail)...);
}
template <class Head> inline void COUT(Head &&head) { cout << (head) << "\n"; }
template <class Head, class... Tail>
inline void COUT(Head &&head, Tail &&... tail) {
cout << (head) << " ";
COUT(forward<Tail>(tail)...);
}
#define CINT(...) \
int __VA_ARGS__; \
CIN(__VA_ARGS__)
#define CCIN(...) \
char __VA_ARGS__; \
CIN(__VA_ARGS__)
#define DCIN(...) \
double __VA_ARGS__; \
CIN(__VA_ARGS__)
#define LCIN(...) \
long long __VA_ARGS__; \
CIN(__VA_ARGS__)
#define SCIN(...) \
string __VA_ARGS__; \
CIN(__VA_ARGS__)
#define Printv(v) \
{ \
REP(hoge, v.size()) \
cout << v[hoge] << (hoge == v.size() - 1 ? "" : " "); \
cout << "\n"; \
}
template <typename T = string> inline void eputs(T s) {
cout << s << "\n";
exit(0);
}
template <typename A, size_t N, typename T>
void Fill(A (&array)[N], const T &val) {
std::fill((T *)array, (T *)(array + N), val);
}
long long next_combination(long long sub) {
long long x = sub & -sub, y = sub + x;
return (((sub & ~y) / x) >> 1) | y;
}
template <class T> inline bool chmax(T &a, const T &b) {
if(a < b) {
a = b;
return 1;
}
return 0;
}
template <class T> inline bool chmin(T &a, const T &b) {
if(a > b) {
a = b;
return 1;
}
return 0;
}
// generic lambdas
template <typename first>
#if defined(__has_cpp_attribute) && __has_cpp_attribute(nodiscard)
[[nodiscard]]
#elif defined(__GNUC__) && \
(__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ >= 4)
__attribute__((warn_unused_result))
#endif // defined(__has_cpp_attribute) && __has_cpp_attribute(nodiscard)
static inline constexpr decltype(auto)
fix(first &&f) noexcept {
return [f = std::forward<first>(f)](auto &&... args) {
return f(f, std::forward<decltype(args)>(args)...);
};
}
template <typename T> using PQG = priority_queue<T, vector<T>, greater<T>>;
template <typename T> using PQ = priority_queue<T>;
typedef long long ll;
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<ll> VL;
typedef vector<VL> VVL;
typedef pair<int, int> PII;
typedef pair<ll, ll> PL;
typedef vector<PL> VPL;
typedef vector<bool> VB;
typedef vector<double> VD;
typedef vector<string> VS;
template <typename T> using V = vector<T>;
template <typename T> using VV = vector<vector<T>>;
const int INF = 1e9;
const ll LINF = 1e18;
const int MOD = 1e9 + 7;
// const int MOD = 998244353;
const int dw[] = {1, 1, 0, -1, -1, -1, 0, 1};
const int dh[] = {0, 1, 1, 1, 0, -1, -1, -1};
#define PI 3.141592653589793230
#define EPS 1e-7
ll dp[2002][2002][2];
void solve() {
LCIN(N);
VL A(N);
VECCIN(A);
Fill(dp, LINF);
dp[0][N][0] = 0;
dp[0][N][1] = 0;
REPR(d, N - 1) REP(l, N - d + 1) {
ll r = l + d;
if(l) chmin(dp[l][r][0], max(A[l - 1], dp[l - 1][r][0]) + 1);
if(l) chmin(dp[l][r][0], max(A[l - 1], dp[l - 1][r][1] + r - l) + 1);
if(r < N) chmin(dp[l][r][1], max(A[r], dp[l][r + 1][1]) + 1);
if(r < N) chmin(dp[l][r][1], max(A[r], dp[l][r + 1][0] + r - l) + 1);
}
ll ans = LINF;
REP(i, N + 1) REP(j, 2) { chmin(ans, dp[i][i][j] - 1); }
COUT(ans);
}
signed main() {
cinfast();
// cout << fixed << setprecision(12);
// loop(solve());
solve();
}
arktan763