Submission #56417

#	Time	Username	Problem	Language	Result	Execution time	Memory
56417		aquablitz11	Robots (IOI13_robots)	C++14	100 / 100	2251 ms	13108 KiB

robots

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

using pii = pair<int, int>;
#define F first
#define S second

int A, B, T, *X, *Y;
vector<pii> toys;

bool check(int lim)
{
    priority_queue<int> Q;
    int j = 0;
    for (int i = 0; i < A; ++i) {
        while (j < T && toys[j].F < X[i])
            Q.emplace(toys[j++].S);
        for (int c = 0; c < lim && !Q.empty(); ++c)
            Q.pop();
    }
    while (j < T) Q.emplace(toys[j++].S);
    for (int i = B-1; i >= 0; --i) {
        if (!Q.empty() && Q.top() >= Y[i]) return false;
        for (int c = 0; c < lim && !Q.empty(); ++c)
            Q.pop();
    }
    return Q.empty();
}

int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[])
{
    ::A = A, ::B = B, ::T = T, ::X = X, ::Y = Y;
    sort(X, X+A);
    sort(Y, Y+B);
    //toys.reserve(T);
    for (int i = 0; i < T; ++i)
        toys.emplace_back(W[i], S[i]);
    sort(toys.begin(), toys.end());
    int b = 1;
    int e = T+1;
    while (b < e) {
        int m = (b+e)/2;
        if (check(m)) e = m;
        else b = m+1;
    }
    return b == T+1 ? -1 : b;
}

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