제출 #544337

#제출 시각아이디문제언어결과실행 시간메모리
544337SavicS선물상자 (IOI15_boxes)C++17
100 / 100
541 ms263104 KiB
#include <ext/pb_ds/assoc_container.hpp> #include <ext/pb_ds/tree_policy.hpp> #include <bits/stdc++.h> using namespace std; using namespace __gnu_pbds; typedef long long ll; typedef long double ld; typedef pair<int,int> pii; typedef pair<ll,ll> pll; typedef pair<ld,ld> pdd; #define ff(i,a,b) for(int i = a; i <= b; i++) #define fb(i,b,a) for(int i = b; i >= a; i--) #define trav(a,x) for (auto& a : x) #define sz(a) (int)(a).size() #define pb push_back #define fi first #define se second #define lb lower_bound #define ub upper_bound #define all(a) a.begin(), a.end() #define rall(a) a.rbegin(), a.rend() mt19937 rng(chrono::steady_clock::now().time_since_epoch().count()); template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>; // os.order_of_key(k) the number of elements in the os less than k // *os.find_by_order(k) print the k-th smallest number in os(0-based) const int mod = 1000000007; const ll inf = 1e18 + 5; const int mxN = 10000005; int n, K, L; int niz[mxN]; ll dp1[mxN]; ll dp2[mxN]; ll delivery(int _N, int _K, int _L, int positions[]){ n = _N; K = _K; L = _L; ff(i,1,n)niz[i] = positions[i - 1]; int pola = L / 2; ff(i,1,n)dp1[i] = inf; dp1[0] = 0; ff(i,1,n){ if(niz[i] <= pola){ dp1[i] = min(dp1[i], dp1[max(0, i - K)] + 2 * niz[i]); } dp1[i] = min(dp1[i], dp1[max(0, i - K)] + L); } ff(i,1,n)dp2[i] = inf; dp2[n + 1] = 0; fb(i,n,1){ if(niz[i] > pola){ dp2[i] = min(dp2[i], dp2[min(n + 1, i + K)] + 2 * (L - niz[i])); } dp2[i] = min(dp2[i], dp2[min(n + 1, i + K)] + L); } ll rez = inf; ff(i,0,n)rez = min(rez, dp1[i] + dp2[i + 1]); return rez; } // int main() { // cin.tie(0)->sync_with_stdio(0); // int _N, _K, _L; // cin >> _N >> _K >> _L; // int A[_N]; // ff(i,0,_N - 1)cin >> A[i]; // cout << delivery(_N, _K, _L, A) << '\n'; // return 0; // } /* 3 2 8 1 2 5 // probati bojenje sahovski */
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