結果
問題 | No.1391 ±1 Abs Sum |
ユーザー |
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提出日時 | 2021-02-12 23:11:26 |
言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
結果 |
WA
|
実行時間 | - |
コード長 | 3,086 bytes |
コンパイル時間 | 2,187 ms |
コンパイル使用メモリ | 195,672 KB |
最終ジャッジ日時 | 2025-01-18 19:41:46 |
ジャッジサーバーID (参考情報) |
judge2 / judge5 |
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ファイルパターン | 結果 |
---|---|
sample | AC * 3 |
other | AC * 21 WA * 13 |
ソースコード
#include <bits/stdc++.h> using namespace std; #define REP(i,n) for(ll i=0;i<(ll)n;i++) #define dump(x) cerr << "Line " << __LINE__ << ": " << #x << " = " << (x) << "\n"; #define spa << " " << #define fi first #define se second #define ALL(a) (a).begin(),(a).end() #define ALLR(a) (a).rbegin(),(a).rend() using ld = long double; using ll = long long; using ull = unsigned long long; using pii = pair<int, int>; using pll = pair<ll, ll>; using pdd = pair<ld, ld>; template<typename T> using V = vector<T>; template<typename T> using P = pair<T, T>; template<typename T> vector<T> make_vec(size_t n, T a) { return vector<T>(n, a); } template<typename... Ts> auto make_vec(size_t n, Ts... ts) { return vector<decltype(make_vec(ts...))>(n, make_vec(ts...)); } template<class S, class T> ostream& operator << (ostream& os, const pair<S, T> v){os << "(" << v.first << ", " << v.second << ")"; return os;} template<typename T> ostream& operator<<(ostream &os, const vector<T> &v) { for (auto &e : v) os << e << ' '; return os; } template<class T> ostream& operator<<(ostream& os, const vector<vector<T>> &v){ for(auto &e : v){os << e << "\n";} return os;} struct fast_ios { fast_ios(){ cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(20); }; } fast_ios_; template <class T> void UNIQUE(vector<T> &x) {sort(ALL(x));x.erase(unique(ALL(x)), x.end());} 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 (a>b) { a=b; return 1; } return 0; } void fail() { cout << -1 << '\n'; exit(0); } inline int popcount(const int x) { return __builtin_popcount(x); } inline int popcount(const ll x) { return __builtin_popcountll(x); } template<typename T> void debug(vector<vector<T>>&v,ll h,ll w){for(ll i=0;i<h;i++) {cerr<<v[i][0];for(ll j=1;j<w;j++)cerr spa v[i][j];cerr<<"\n";}}; template<typename T> void debug(vector<T>&v,ll n){if(n!=0)cerr<<v[0]; for(ll i=1;i<n;i++)cerr spa v[i]; cerr<<"\n";}; const ll INF = (1ll<<62); // const ld EPS = 1e-10; // const ld PI = acos(-1.0); const ll mod = (int)1e9 + 7; //const ll mod = 998244353; int main(){ ll N, K; cin >> N >> K; V<ll> A(N); REP(i, N) cin >> A[i]; auto F = [&](V<ll> &beta, ll x){ ll res = 0; REP(i, N){ res += beta[i] * abs(x - A[i]); } return res; }; V<ll> b(N); ll res = INF; auto calc = [&](V<ll> &B){ ll ans = INF; V<ll> kei(N+1); kei[0] = N - 2*K; REP(i, N){ kei[i+1] = kei[i] + 2*B[i]; } // dump(kei) chmin(ans, F(B, A[0])); chmin(ans, F(B, A[N-1])); REP(i, N){ if(kei[i] <= 0 and kei[i+1]>=0){ chmin(ans, F(B, A[i])); if(i<N-1) chmin(ans, F(B, A[i+1])); } } return ans; }; REP(i, N) b[i] = (i < K ? 1 : -1); chmin(res, calc(b)); REP(i, N) b[i] = (i < N-K ? -1 : 1); chmin(res, calc(b)); cout << res << endl; return 0; }