Submission #1195643

#	Time	Username	Problem	Language	Result	Execution time	Memory
1195643		dosts	Boxes with souvenirs (IOI15_boxes)	C++20	20 / 100	0 ms	328 KiB

boxes

#include "boxes.h"
#include <bits/stdc++.h>
#pragma GCC target("lzcnt,popcnt")
#pragma GCC optimize("O3,unroll-loops")
#define int long long
#define pii pair<int,int>
#define vi vector<int>
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
#define sp << " " << 
using namespace std;

int delivery(int32_t N, int32_t K, int32_t L, int32_t p[]) {
    vi sol,sag;
    for (int i = 0;i<N;i++) {
        if (p[i] <= L/2) sag.push_back(p[i]);
        else break;
    }
    for (int i = N-1;i>=0;i--) {
        if (p[i] > L/2) sol.push_back(p[i]);
        else break;
    }
    int ans = 0;
    while (sag.size() >= K) {
        ans+=2*sag.back();
        for (int j = 0;j<K;j++) sag.pop_back();
    }
    while (sol.size() >= K) {
        ans+=2*(L-sol.back());
        for (int j = 0;j<K;j++) sol.pop_back();
    }
    int op1 = ((sol.empty())?0ll:(2*(L-sol.back())))+((sag.empty())?0ll:(2*sag.back()));
    vi lst;
    for (auto it : sag) lst.push_back(it);
    for (int i = sol.size()-1;i>=0;i--) lst.push_back(sol[i]);
    int op2 = 2e18;
    if (lst.size() <= K) op2 = L;
    else {
        op2 = L+2*min(L-lst[K],lst[lst.size()-K-1]);
    }
    return ans+min(op1,op2);
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30