Submission #1143209

#	Time	Username	Problem	Language	Result	Execution time	Memory
1143209		Sang	Boxes with souvenirs (IOI15_boxes)	C++20	100 / 100	490 ms	274348 KiB

boxes

#include<bits/stdc++.h>
using namespace std;

#define int long long
#define FOR(i, a, b) for (int i = (a), _b = (b); i <= _b; i++)
#define FORD(i, a, b) for (int i = (a), _b = (b); i >= _b; i--)
#define fi first
#define se second
#define pb push_back
#define ALL(a) (a).begin(), (a).end()
#define task "kbsiudthw"

typedef vector<int> vi;
typedef pair<int, int> ii;
typedef pair<int, ii> pii;

const int N = 1e5 + 5;
const int INF = 0x3f3f3f3f;
const int MOD = 1e9 + 2277;



long long delivery(int32_t N, int32_t K, int32_t L, int32_t p[]) {
    vector<vector<long long>> dp(2, vector<long long>(N + 5, 0));
    deque<int> dq;
    dq.push_back(0);
    FOR (i, 1, N){
        while (dq.front() + K < i) dq.pop_front();
        dp[0][i] = dp[0][dq.front()] + min(L, p[i-1] * 2);
        while (!dq.empty() && dp[0][dq.back()] >= dp[0][i]) dq.pop_back();
        dq.push_back(i);
    }
    dq.clear(); dq.pb(N+1);
    FORD(i, N, 1){
        while (dq.front() - K > i) dq.pop_front();
        dp[1][i] = dp[1][dq.front()] + min(L, (L - p[i-1]) * 2);
        while (!dq.empty() && dp[1][dq.back()] >= dp[1][i]) dq.pop_back();
        dq.push_back(i);
    }
    long long ans = 1e18;
    FOR (i, 0, N) ans = min(ans, dp[0][i] + dp[1][i+1]);
    return ans;
}

//signed main(){
//    ios_base::sync_with_stdio(0);
//    cin.tie(0); cout.tie(0);
//    if (fopen(task".inp", "r")){
//        freopen(task".inp", "r", stdin);
//        freopen(task".out", "w", stdout);
//    }
//    int p[] = {1, 2, 5};
//    cout << delivery(3, 2, 8, p);
//
//    return 0;
//}

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