結果
問題 | No.2100 [Cherry Alpha C] Two-way Steps |
ユーザー |
![]() |
提出日時 | 2022-10-14 22:25:43 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
AC
|
実行時間 | 122 ms / 2,000 ms |
コード長 | 3,020 bytes |
コンパイル時間 | 2,110 ms |
コンパイル使用メモリ | 203,984 KB |
最終ジャッジ日時 | 2025-02-08 04:21:00 |
ジャッジサーバーID (参考情報) |
judge4 / judge3 |
(要ログイン)
ファイルパターン | 結果 |
---|---|
other | AC * 48 |
ソースコード
#include<bits/stdc++.h>using namespace std;using int64 = long long;const int mod = 998244353;const int64 infll = (1LL << 62) - 1;const int inf = (1 << 30) - 1;struct IoSetup {IoSetup() {cin.tie(nullptr);ios::sync_with_stdio(false);cout << fixed << setprecision(10);cerr << fixed << setprecision(10);}} iosetup;template< typename T1, typename T2 >ostream &operator<<(ostream &os, const pair< T1, T2 > &p) {os << p.first << " " << p.second;return os;}template< typename T1, typename T2 >istream &operator>>(istream &is, pair< T1, T2 > &p) {is >> p.first >> p.second;return is;}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< typename T1, typename T2 >inline bool chmax(T1 &a, T2 b) { return a < b && (a = b, true); }template< typename T1, typename T2 >inline bool chmin(T1 &a, T2 b) { return a > b && (a = b, true); }template< typename T = int64 >vector< T > make_v(size_t a) {return vector< T >(a);}template< typename T, typename... Ts >auto make_v(size_t a, Ts... ts) {return vector< decltype(make_v< T >(ts...)) >(a, make_v< T >(ts...));}template< typename T, typename V >typename enable_if< is_class< T >::value == 0 >::type fill_v(T &t, const V &v) {t = v;}template< typename T, typename V >typename enable_if< is_class< T >::value != 0 >::type fill_v(T &t, const V &v) {for (auto &e: t) fill_v(e, v);}template< typename F >struct FixPoint: F {explicit FixPoint(F &&f): F(forward< F >(f)) {}template< typename... Args >decltype(auto) operator()(Args &&... args) const {return F::operator()(*this, forward< Args >(args)...);}};template< typename F >inline decltype(auto) MFP(F &&f) {return FixPoint< F >{forward< F >(f)};}int main() {int N, M;cin >> N >> M;vector< int > H(N);cin >> H;vector< vector< int > > g(N);for(int i = 0; i < M; i++) {int a, b;cin >> a >> b;--a, --b;g[a].emplace_back(b);g[b].emplace_back(a);}{auto dp = make_v< int64 >(N, 2);fill_v(dp, -infll);dp[0][0] = 0;for(int i = 0; i < N; i++) {for(auto& j : g[i]) {if(i < j) {if(H[i] < H[j]) chmax(dp[j][1], dp[i][0] + H[j] - H[i]);else chmax(dp[j][0], max(dp[i][1], dp[i][0]));}}}cout << max({dp[N - 1][0], dp[N - 1][1], -1LL}) << endl;}{auto dp = make_v< int64 >(N, 2);fill_v(dp, -infll);dp[N - 1][0] = 0;for(int i = N - 1; i >= 0; i--) {for(auto& j : g[i]) {if(i > j) {if(H[i] < H[j]) chmax(dp[j][1], dp[i][0] + H[j] - H[i]);else chmax(dp[j][0], max(dp[i][1], dp[i][0]));}}}cout << max({dp[0][0], dp[0][1], -1LL}) << endl;}}