Submission #1192158

#	Time	Username	Problem	Language	Result	Execution time	Memory
1192158		burgerguy	Robots (IOI13_robots)	C++20	0 / 100	0 ms	328 KiB

robots

#include <bits/stdc++.h>
#include "robots.h"

using namespace std;
using ll = long long;

struct Toy {
    ll weight, size, index;
};

bool cmpWeight(Toy& a, Toy& b) {
    if(a.weight == b.weight) return a.size > b.size;
    return a.weight < b.weight;
}

bool cmpSize(Toy& a, Toy& b){
    if(a.size == b.size) return a.weight > b.weight;
    return a.size > b.size;
}

ll toyCount;
vector<ll> robotWeights, robotSizes;
vector<Toy> toyWeights, toySizes;

bool isValidTime(ll time) {
    vector<bool> completedToys(toyCount);
    priority_queue<pair<ll,ll>> pq;

    ll curToyIndex = 0;
    for (int curRobot = 0; curRobot < robotWeights.size(); ++curRobot) {
        ll curWeightLimit = robotWeights[curRobot];

        while(curToyIndex < toyCount) {
            Toy& curToy = toyWeights[curToyIndex];

            if(curToy.weight >= curWeightLimit) break;
            if(completedToys[curToy.index]) continue;

            pq.emplace(curToy.size, curToy.index);

            ++curToyIndex;
        }

        ll toysPickedUp = 0;
        while(!pq.empty() && toysPickedUp < time) {
            ll curToyIndex = pq.top().second; pq.pop();

            if(completedToys[curToyIndex]) continue;

            ++toysPickedUp;
            completedToys[curToyIndex] = true;
        }
    }

    curToyIndex = 0;
    for (int curRobot = 0; curRobot < robotSizes.size(); ++curRobot) {
        ll curSizeLimit = robotSizes[curRobot];
        ll toysPickedUp = 0;

        while(curToyIndex < toyCount) {
            Toy& curToy = toyWeights[curToyIndex];

            if(completedToys[curToy.index]) {
                ++curToyIndex;
                continue;
            }
            if(toysPickedUp == time) break;

            if(curToy.size >= curSizeLimit) return false;

            ++toysPickedUp;
            ++curToyIndex;
        }
    }

    return true;
}


int putaway(int A,int B,int T, int X[],int Y[],int W[],int S[]) {
    toyCount = T;

    for (int i = 0; i < A; ++i) {
        robotWeights.push_back(X[i]);
    }
    for (int i = 0; i < B; ++i) {
        robotSizes.push_back(Y[i]);
    }

    for (int i = 0; i < T; ++i) {
        toyWeights.push_back({W[i], S[i], i});
    }

    sort(toyWeights.begin(), toyWeights.end(), cmpWeight);
    sort(toySizes.begin(), toySizes.end(), cmpSize);

    sort(robotWeights.begin(), robotWeights.end());
    sort(robotSizes.rbegin(), robotSizes.rend());

    ll minTime = 1, maxTime = T;

    while(minTime <= maxTime) {
        ll midTime = (maxTime + minTime)/2;

        if(isValidTime(midTime)) {
            maxTime = midTime - 1;
        }
        else {
            minTime = midTime + 1;
        }
    }

    if(isValidTime(minTime)) return minTime;
    else return -1;
}


//int main() {
//    ll A,B,T; cin >> A >> B >> T;
//    int X[A], Y[B], W[T], S[T];
//
//    for (int i = 0; i < A; ++i) {
//        cin >> X[i];
//    }
//    for (int i = 0; i < B; ++i) {
//        cin >> Y[i];
//    }
//
//    for (int i = 0; i < T; ++i) {
//        cin >> W[i] >> S[i];
//    }
//
//    cout << putaway(A,B,T,X,Y,W,S) << '\n';
//}

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