Submission #793110

#	Time	Username	Problem	Language	Result	Execution time	Memory
793110		PixelCat	Boxes with souvenirs (IOI15_boxes)	C++14	100 / 100	470 ms	76024 KiB

boxes

#ifdef NYAOWO
#include "grader.cpp"
#endif

#include "boxes.h"

#include <bits/stdc++.h>
#define For(i, a, b) for(int i = a; i <= b; i++)
#define Forr(i, a, b) for(int i = a; i >= b; i--)
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define sz(x) ((int)x.size())
#define eb emplace_back
#define int LL
using namespace std;
using LL = long long;
using pii = pair<int, int>;

const int INF = 1'000'000'000'000'000'000;

long long delivery(int32_t N, int32_t K, int32_t L, int32_t pos[]) {
    int dp = 0;
    deque<pii> dq;  // {index, value}
    For(i, 1, N) {
        int a = pos[i - 1];
        int c = min(a, L - a);
        if(sz(dq) && dq.front().F <= i - K) dq.pop_front();
        int val = dp + c - a;
        while(sz(dq) && dq.back().S > val) dq.pop_back();
        dq.eb(i, val);
        dp = a + c + dq.front().S;
    }
    return dp;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 15 / 15
• Subtask 4: 15 / 15
• Subtask 5: 20 / 20
• Subtask 6: 30 / 30