Submission #993414

#	Time	Username	Problem	Language	Result	Execution time	Memory
993414		Muaath_5	Robots (IOI13_robots)	C++17	28 / 100	3070 ms	40308 KiB

robots

#pragma GCC optimize("Ofast,O3,unroll-loops")
#pragma GCC target("avx2,avx,sse3,sse4")
#include "robots.h"
#include <bits/stdc++.h>
using namespace std;

int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[]) {
    sort(X, X+A);
    sort(Y, Y+B);
    vector<pair<int, int>> v;
    for (int i = 0; i < T; i++)
        v.push_back({W[i], S[i]});
    sort(v.begin(), v.end());
    for (int i = 0; i < T; i++) {
        W[i] = v[i].first, S[i] = v[i].second;
        
        if (A && B) if (W[i] >= X[A-1] && S[i] >= Y[B-1])
            return -1;
        if (A && !B) if (W[i] >= X[A-1])
            return -1;
        if (!A && B) if (S[i] >= Y[B-1])
            return -1;
    }
        

    if (T == 2 && A+B == 2) {
        if (A==2) {
            if (*max_element(X, X+A) <= *max_element(W, W+T)) return -1;
            if (X[0] > W[0] && X[1] > W[1]) return 1;
            return 2;
        }
        if (B==2) {
            if (*max_element(Y, Y+B) <= *max_element(S, S+T)) return -1;
            if (Y[0] > S[0] && Y[1] > S[1]) return 1;
            return 2;
        }
        if ((X[0] > W[0] && Y[0] > S[1]) ||
            (X[0] > W[1] && Y[0] > S[0]))
            return 1;

        if ((X[0] > W[0] && X[0] > W[1]) ||
            (Y[0] > S[0] && Y[0] > S[1]))
            return 2;
        return -1;
    }
    if (B == 0) {
        multiset<int> s;
        for (int i = 0; i < T; i++)
            s.insert(W[i]);
        int sol = 0;
        while (s.size()) {
            for (int i = A-1; s.size() && i >= 0; i--) {
                auto it = s.lower_bound(X[i]);
                if (it == s.begin()) break;
                it--;
                s.erase(it);
            }
            sol++;
        }
        return sol;
    }

    int l = 1, r = T;
    while (l < r) {
        const int mid = (l+r)/2;
        int idx = 0;
        priority_queue<int> pq;
        for (int i = 0; idx < T && i < A; i++) {
            while (idx < T && W[idx] < X[i]) {
                pq.push(W[idx]);
                idx++;
            }
            for (int j = 0; pq.size() && j < mid; j++)
                pq.pop();
        }

        bool ok = true;
        for (int i = B; i >= 0; i--) {
            for (int j = 0; j < mid; j++) {
                if (!pq.size()) break;
                if (pq.top() >= Y[i]) {
                    ok = false;
                    break;
                }
            }
            if (!pq.size()) break;
            if (!ok) break;
        }

        if (ok)
            l = mid;
        else
            r = mid-1;
    }
    return l; 
}

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 0 / 25
• Subtask 4: 0 / 37
• Subtask 5: 0 / 10