結果
問題 |
No.1668 Grayscale
|
ユーザー |
![]() |
提出日時 | 2021-09-03 22:48:39 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 4,290 bytes |
コンパイル時間 | 2,295 ms |
コンパイル使用メモリ | 213,460 KB |
最終ジャッジ日時 | 2025-01-24 06:38:54 |
ジャッジサーバーID (参考情報) |
judge1 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 2 |
other | AC * 11 WA * 11 |
ソースコード
#include "bits/stdc++.h" #include <random> #include <chrono> #pragma GCC target("avx2") #pragma GCC optimize("O3") #pragma GCC optimize("unroll-loops") #define ALL(x) (x).begin(), (x).end() #define RALL(x) (x).rbegin(), (x).rend() #define SZ(x) ((lint)(x).size()) #define FOR(i, begin, end) for(lint i=(begin),i##_end_=(end);i<i##_end_;++i) #define IFOR(i, begin, end) for(lint i=(end)-1,i##_begin_=(begin);i>=i##_begin_;--i) #define REP(i, n) FOR(i,0,n) #define IREP(i, n) IFOR(i,0,n) #define endk '\n' using namespace std; typedef unsigned long long _ulong; typedef long long int lint; typedef long double ld; typedef pair<lint, lint> plint; typedef pair<ld, ld> pld; struct fast_ios { fast_ios() { cin.tie(nullptr), ios::sync_with_stdio(false), cout << fixed << setprecision(20); }; } fast_ios_; template<class T> auto add = [](T a, T b) -> T { return a + b; }; template<class T> auto mul = [](T a, T b) -> T { return a * b; }; template<class T> auto f_max = [](T a, T b) -> T { return max(a, b); }; template<class T> auto f_min = [](T a, T b) -> T { return min(a, b); }; template<class T> using V = vector<T>; using Vl = V<lint>; using VVl = V<Vl>; template< typename T > ostream& operator<<(ostream& os, const vector< T >& v) { for (int i = 0; i < (int)v.size(); i++) os << v[i] << (i + 1 != v.size() ? " " : ""); return os; } template< typename T >istream& operator>>(istream& is, vector< T >& v) { for (T& in : v) is >> in; return is; } template<class T> bool chmax(T& a, const T& b) { if (a < b) { a = b; return 1; } return 0; } template<class T> bool chmin(T& a, const T& b) { if (b < a) { a = b; return 1; } return 0; } template <class T> T div_floor(T a, T b) { if (b < 0) a *= -1, b *= -1; return a >= 0 ? a / b : (a + 1) / b - 1; } template <class T> T div_ceil(T a, T b) { if (b < 0) a *= -1, b *= -1; return a > 0 ? (a - 1) / b + 1 : a / b; } template <class F> struct rec { F f; rec(F&& f_) : f(std::forward<F>(f_)) {} template <class... Args> auto operator()(Args &&... args) const { return f(*this, std::forward<Args>(args)...); } }; lint gcd(lint a, lint b) { if (b == 0) return a; else return gcd(b, a % b); } lint digit(lint a) { return (lint)log10(a); } lint e_dist(plint a, plint b) { return abs(a.first - b.first) * abs(a.first - b.first) + abs(a.second - b.second) * abs(a.second - b.second); } lint m_dist(plint a, plint b) { return abs(a.first - b.first) + abs(a.second - b.second); } bool check_overflow(lint a, lint b, lint limit) { if (b == 0) return false; return a > limit / b; } // a * b > c => true void Worshall_Floyd(VVl& g) { REP(k, SZ(g)) REP(i, SZ(g)) REP(j, SZ(g)) chmin(g[i][j], g[i][k] + g[k][j]); } const lint MOD1000000007 = 1000000007, MOD998244353 = 998244353, INF = 2e9; lint dx[8] = { 0, -1, 0, 1, 1, -1, 1, -1 }, dy[8] = { -1, 0, 1, 0, -1, -1, 1, 1 }; bool YN(bool flag) { cout << (flag ? "YES" : "NO") << endk; return flag; } bool yn(bool flag) { cout << (flag ? "Yes" : "No") << endk; return flag; } struct Edge { lint from, to; ld cost; Edge() { } Edge(lint u, lint v, ld c) { cost = c; from = u; to = v; } bool operator<(const Edge& e) const { return cost < e.cost; } }; struct WeightedEdge { lint to; lint cost; WeightedEdge(lint v, lint c = 1) { to = v; cost = c; } bool operator<(const WeightedEdge& e) const { return cost < e.cost; } }; using WeightedGraph = V<V<WeightedEdge>>; typedef pair<lint, plint> tlint; typedef pair<tlint, plint> qlint; typedef pair<string, lint> valstr; int main() { lint H, W, K; cin >> H >> W >> K; Vl maxv(K, -1), minv(K, K); VVl arr(H, Vl(W)); cin >> arr; REP(i, H) REP(j, W) arr[i][j]--; REP(i, H) { REP(j, W) { REP(k, 4) { lint nx = i + dx[k], ny = j + dy[k]; if (nx < 0 || ny < 0 || nx >= H || ny >= W) continue; if (arr[i][j] < arr[nx][ny]) chmin(minv[arr[i][j]], arr[nx][ny]); else if(arr[i][j] > arr[nx][ny]) chmax(maxv[arr[i][j]], arr[nx][ny]); } } } Vl dp(K, INF); dp[0] = 1; IREP(i, K - 1) chmin(minv[i], minv[i + 1]); REP(i, K - 1) chmax(maxv[i + 1], maxv[i]); VVl to(K); REP(i, K) if (minv[i] != K) to[i].push_back(minv[i]); REP(i, K) if (maxv[i] != -1) to[maxv[i]].push_back(i); REP(i, K - 1) to[i].push_back(i + 1); REP(i, K) for (lint v : to[i]) chmin(dp[v], dp[i] + 1); cout << dp[K - 1] << endk; }