Submission #965502

#	Time	Username	Problem	Language	Result	Execution time	Memory
965502		ThegeekKnight16	Robots (IOI13_robots)	C++17	76 / 100	3041 ms	44452 KiB

robots

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

bool Test(int x, int A, int B, int T, int *X, int *Y, const vector<pair<int, int>> &Toy)
{
    if ((long long)x*(A+B) < T) return 0;
    vector<pair<int, int>> sweep; //weight, id
    for (int i = 0; i < T; i++) sweep.emplace_back(Toy[i].first, i);
    for (int i = 0; i < A; i++) sweep.emplace_back(X[i], -1);
    sort(sweep.begin(), sweep.end());

    multiset<int> remain;
    for (auto [w, id] : sweep)
    {
        if (id == -1)
        {
            int remov = x;
            while (remov > 0 && !remain.empty()) remain.erase(prev(remain.end())), --remov;
        }
        else remain.insert(Toy[id].second);
    }

    sweep.clear(); //now size, type
    for (auto x : remain) sweep.emplace_back(x, 1);
    for (int i = 0; i < B; i++) sweep.emplace_back(Y[i], -1);
    sort(sweep.begin(), sweep.end());
    int cnt = 0;
    for (auto [s, type] : sweep)
    {
        if (type == -1) cnt = max(0, cnt-x);
        else cnt++;
    }
    return (cnt == 0);
}

int putaway(int A, int B, int T, int X[], int Y[], int _W[], int _S[])
{
    vector<pair<int, int>> Toy(T);
    for (int i = 0; i < T; i++) Toy[i] = make_pair(_W[i], _S[i]);
    sort(X, X+A); sort(Y, Y+B);
    for (int i = 0; i < T; i++) if (Toy[i].first >= X[A-1] && Toy[i].second >= Y[B-1]) return -1;
    sort(Toy.begin(), Toy.end());

    int ini = 1, fim = T;
    while (ini < fim)
    {
        int m = (ini + fim) >> 1;
        if (Test(m, A, B, T, X, Y, Toy)) fim = m;
        else ini = m+1;
    }
    return fim;
}

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