제출 #770031

#제출 시각아이디문제언어결과실행 시간메모리
770031teokakabadze선물상자 (IOI15_boxes)C++17
100 / 100
1396 ms380108 KiB
#include "boxes.h" #include<bits/stdc++.h> #define f first #define s second #define pb push_back #define ll long long #define NN 10000007 #define pii pair<int, int> using namespace std; ll n, k, a[NN], dp[NN], dp1[NN], ans, i, l; deque<pair<ll, ll> > d; long long delivery(int N, int K, int L, int p[]) { n = N, k = K, l = L; for(i = 0; i < n; i++) a[i] = p[i]; d.pb({0, -1}); for(i = 0; i < n; i++) { if(d.front().s == i - k - 1) d.pop_front(); dp[i] = min(l, 2 * a[i]) + d.front().f; while(d.size() && d.front().f >= dp[i]) d.pop_front(); d.pb({dp[i], i}); } while(d.size()) d.pop_back(); d.pb({0, n}); for(i = n - 1; i >= 0; i--) { if(d.front().s == i + k + 1) d.pop_front(); dp1[i] = min(l, 2 * (L - a[i])) + d.front().f; while(d.size() && d.front().f >= dp1[i]) d.pop_front(); d.pb({dp1[i], i}); } ans = 1e18; for(i = 0; i < n; i++) ans = min(ans, dp[i] + dp1[(i + 1) % n]); return min(min(dp[n - 1], dp1[0]), ans); }
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