Submission #1040979

#	Time	Username	Problem	Language	Result	Execution time	Memory
1040979		Zicrus	Closing Time (IOI23_closing)	C++17	0 / 100	1080 ms	14320 KiB

closing

#include <bits/stdc++.h>
#include "closing.h"
using namespace std;
 
typedef long long ll;
 
int max_score(int n, int x, int y, ll k, vector<int> u, vector<int> v, vector<int> w) {
    vector<ll> distX(n), distY(n), totX(n), totY(n);
    for (int i = x-1; i >= 0; i--) {
        distX[i] = distX[i+1] + w[i];
        totX[i] = totX[i+1] + distX[i];
    }
    for (int i = x+1; i < n; i++) {
        distX[i] = distX[i-1] + w[i-1];
        totX[i] = totX[i-1] + distX[i];
    }
    for (int i = y-1; i >= 0; i--) {
        distY[i] = distY[i+1] + w[i];
        totY[i] = totY[i+1] + distY[i];
    }
    for (int i = y+1; i < n; i++) {
        distY[i] = distY[i-1] + w[i-1];
        totY[i] = totY[i-1] + distY[i];
    }
    vector<ll> mx(n), mxSum(n+1);
    for (int i = 0; i < n; i++) {
        mx[i] = max(distX[i], distY[i]);
        mxSum[i+1] = mxSum[i] + mx[i];
    }

    ll res = 0;
    for (int x1 = 0; x1 <= x; x1++) {
        for (int y1 = x1; y1 <= y; y1++) {
            for (int y2 = y; y2 < n; y2++) {
                for (int x2 = x; x2 <= y2; x2++) {
                    ll val = x2-x1+1 + y2-y1+1;
                    if (val <= res) continue;

                    ll cost = 1ll << 62ll;
                    if (x2 < y1) {
                        cost = totX[x1] + totX[x2] + totY[y1] + totY[y2];
                    }
                    else {
                        cost = totX[x1] + (y1 < x ? -totX[y1-1] : totX[y1-1]) + (x2 > y ? -totY[x2+1] : totY[x2+1]) + totY[y2]
                             + (mxSum[x2+1] - mxSum[y1]);
                    }
                    
                    if (cost <= k) res = val;
                    else break;
                }
            }
        }
    }
    return res;
}

• Subtask 0: 0 / 0
• Subtask 1: 0 / 8
• Subtask 2: 0 / 9
• Subtask 3: 0 / 12
• Subtask 4: 0 / 14
• Subtask 5: 0 / 9
• Subtask 6: 0 / 11
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 17