Submission #971024

#	Time	Username	Problem	Language	Result	Execution time	Memory
971024		andro	Robots (IOI13_robots)	C++14	53 / 100	169 ms	10180 KiB

robots

#include <bits/stdc++.h>

#include "robots.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);
    for(int i = 0; i < T; i++) {
        if(W[i] >= X[A - 1] && S[i] >= Y[B - 1]) {
            return - 1;
        }
    }
    vector<pair<int,int>> omg;
    for(int i = 0; i < T; i++) {
        omg.push_back({W[i], S[i]});
    }
    sort(omg.begin(), omg.end());
    int l = 1, r = 1e6, ans = - 1;
    while(l <= r) {
        int mid = (l + r) / 2;
        int pok = A - 1;
        int R = 0;
        int pok1 = B - 1;
        int ok = 0;
        int R1 = 0;
        for(int i = omg.size() - 1; i >= 0; i--) {
            if(pok < 0 && pok1 < 0) {
                ok = 1;
                break;
            }
            if(pok < 0) {
                if(Y[pok1] <= omg[i].second) {
                    ok = 1;
                    break;
                }
                R1 += 1;
                if(R1 >= mid) {
                    R1 = 0;
                    pok1 -= 1;
                }
                continue;
            }
            if(pok1 < 0) {
                if(X[pok] <= omg[i].first) {
                    ok = 1;
                    break;
                }
                R += 1;
                if(R >= mid) {
                    R = 0;
                    pok -= 1;
                }
                continue;
            }
            if(X[pok] <= omg[i].first) {
                if(Y[pok1] <= omg[i].second) {
                    ok = 1;
                    break;
                }
                R1 += 1;
                if(R1 >= mid) {
                    R1 = 0;
                    pok1 -= 1;
                }
                continue;
            }
            if(Y[pok1] <= omg[i].first) {
                if(X[pok] <= omg[i].first) {
                    ok = 1;
                    break;
                }
                R += 1;
                if(R >= mid) {
                    R = 0;
                    pok -= 1;
                }
                continue;
            }
            //! mogu oba gledam onog kome je r manji
            if(R <= R1) {
                R += 1;
                if(R >= mid) {
                    R = 0;
                    pok -= 1;
                }
            }
            else {
                R1 += 1;
                if(R1 >= mid) {
                    R1 = 0;
                    pok1 -= 1;
                }
            }
        }
        ok ^= 1;
        if(ok) {
            r = mid - 1;
            ans = mid;
        }
        else {
            l = mid + 1;
        }
    }
    return ans;
}
/*
int main() {
    int A = 3;
    int B = 2;
    int T = 10;
    int X[3] = {6, 2, 9};
    int Y[2] = {4, 7};
    int W[10] = {4, 8, 2, 7, 1, 5, 3, 8, 7, 10};
    int S[10] = {6, 5, 3, 9, 8, 1, 3, 7, 6, 5};
    cout << putaway(A, B, T, X, Y, W, S);
    int A = 2;
    int B = 1;
    int T = 3;
    int X[2] = {2, 5};
    int Y[1] = {2};
    int W[3] = {3, 5, 2};
    int S[3] = {1, 3, 2};
    cout << putaway(A, B, T, X, Y, W, S);
}*/

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