結果
問題 | No.1906 Twinkle Town |
ユーザー | Sumitacchan |
提出日時 | 2022-02-11 16:05:13 |
言語 | C++17 (gcc 12.3.0 + boost 1.83.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,460 bytes |
コンパイル時間 | 2,326 ms |
コンパイル使用メモリ | 211,204 KB |
実行使用メモリ | 17,360 KB |
最終ジャッジ日時 | 2024-06-27 10:20:17 |
合計ジャッジ時間 | 6,365 ms |
ジャッジサーバーID (参考情報) |
judge5 / judge3 |
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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 |
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testcase_00 | AC | 2 ms
6,816 KB |
testcase_01 | AC | 2 ms
6,944 KB |
testcase_02 | AC | 2 ms
6,940 KB |
testcase_03 | WA | - |
testcase_04 | WA | - |
testcase_05 | WA | - |
testcase_06 | WA | - |
testcase_07 | WA | - |
testcase_08 | WA | - |
testcase_09 | WA | - |
testcase_10 | WA | - |
testcase_11 | WA | - |
testcase_12 | WA | - |
testcase_13 | WA | - |
testcase_14 | WA | - |
testcase_15 | WA | - |
testcase_16 | WA | - |
testcase_17 | WA | - |
testcase_18 | WA | - |
testcase_19 | WA | - |
testcase_20 | WA | - |
testcase_21 | WA | - |
testcase_22 | WA | - |
testcase_23 | WA | - |
testcase_24 | WA | - |
testcase_25 | WA | - |
testcase_26 | WA | - |
testcase_27 | WA | - |
testcase_28 | WA | - |
testcase_29 | WA | - |
testcase_30 | WA | - |
testcase_31 | WA | - |
testcase_32 | WA | - |
testcase_33 | WA | - |
testcase_34 | WA | - |
testcase_35 | WA | - |
testcase_36 | WA | - |
testcase_37 | WA | - |
testcase_38 | WA | - |
testcase_39 | WA | - |
testcase_40 | WA | - |
testcase_41 | WA | - |
testcase_42 | WA | - |
testcase_43 | WA | - |
testcase_44 | WA | - |
testcase_45 | WA | - |
testcase_46 | WA | - |
testcase_47 | WA | - |
testcase_48 | WA | - |
testcase_49 | WA | - |
ソースコード
#include <bits/stdc++.h> using namespace std; //using namespace atcoder; struct fast_ios { fast_ios(){ cin.tie(0); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_; #define FOR(i, begin, end) for(int i=(begin);i<(end);i++) #define REP(i, n) FOR(i,0,n) #define IFOR(i, begin, end) for(int i=(end)-1;i>=(begin);i--) #define IREP(i, n) IFOR(i,0,n) #define Sort(v) sort(v.begin(), v.end()) #define Reverse(v) reverse(v.begin(), v.end()) #define all(v) v.begin(),v.end() #define SZ(v) ((int)v.size()) #define Lower_bound(v, x) distance(v.begin(), lower_bound(v.begin(), v.end(), x)) #define Upper_bound(v, x) distance(v.begin(), upper_bound(v.begin(), v.end(), x)) #define chmax(a, b) a = max(a, b) #define chmin(a, b) a = min(a, b) #define bit(n) (1LL<<(n)) #define debug(x) cout << #x << "=" << x << endl; #define vdebug(v) { cout << #v << "=" << endl; REP(i_debug, (int)v.size()){ cout << v[i_debug] << ","; } cout << endl; } #define mdebug(m) { cout << #m << "=" << endl; REP(i_debug, (int)m.size()){ REP(j_debug, (int)m[i_debug].size()){ cout << m[i_debug][j_debug] << ","; } cout << endl;} } #define pb push_back #define fi first #define se second #define int long long #define INF 1000000000000000000 template<typename T> istream &operator>>(istream &is, vector<T> &v){ for (auto &x : v) is >> x; return is; } template<typename T> ostream &operator<<(ostream &os, vector<T> &v){ for(int i = 0; i < (int)v.size(); i++) { cout << v[i]; if(i != (int)v.size() - 1) cout << endl; }; return os; } template<typename T1, typename T2> ostream &operator<<(ostream &os, pair<T1, T2> p){ cout << '(' << p.first << ',' << p.second << ')'; return os; } template<typename T> void Out(T x) { cout << x << endl; } template<typename T1, typename T2> void chOut(bool f, T1 y, T2 n) { if(f) Out(y); else Out(n); } using vec = vector<int>; using mat = vector<vec>; using Pii = pair<int, int>; using v_bool = vector<bool>; using v_Pii = vector<Pii>; //int dx[4] = {1,0,-1,0}; //int dy[4] = {0,1,0,-1}; //char d[4] = {'D','R','U','L'}; //const int mod = 1000000007; const int mod = 998244353; int solve_even(vec A, int N){ int ans = 0, t = 0; // 右から何個とるか REP(k, N / 2 + 1){ if(k >= 1){ int i = N - 2 - 2 * (k - 1); t += (i > 0 ? A[i] - A[i - 1] : A[i]); } int rest = N / 2 - k; chmax(ans, t + (rest > 0 ? A[rest - 1] : 0)); } return ans; } int solve_odd(vec A, int N){ if(N == 1) return A[0]; int ans = 0; // 最初にA[N-1] chmax(ans, A[N - 1] - A[N - 2] + solve_even(A, N - 1)); // 最初にそれ以外 mat dp(N + 1, vec(2, -INF)); dp[N][0] = 0; IFOR(i, 1, N){ if(i + 2 <= N){ REP(j, 2) chmax(dp[i][j], dp[i + 2][j] + A[i] - A[i - 1]); } if(i + 3 <= N){ chmax(dp[i][1], dp[i + 3][0] + A[i] - A[i - 1]); } } FOR(i, 1, N + 1){ int rest = N / 2 - (N - i) / 2; if(rest == 0){ REP(j, 2) chmax(ans, dp[i][j] + A[i - 1]); }else{ REP(j, 2) chmax(ans, dp[i][j] + A[rest - 1 + (1 - j)]); } } return ans; } signed main(){ int T; cin >> T; vec ans(T); REP(q, T){ int N; cin >> N; vec A(N); cin >> A; Sort(A); if(N % 2) ans[q] = solve_odd(A, N); else ans[q] = A.back() - solve_even(A, N); } cout << ans << endl; return 0; }