Submission #372953

#	Time	Username	Problem	Language	Result	Execution time	Memory
372953		Joshc	Robots (IOI13_robots)	C++11	100 / 100	1847 ms	25004 KiB

robots

#include "robots.h"
#include <cstdio>
#include <algorithm>
#include <vector>
#include <queue>
using namespace std;

int putaway(int a, int b, int t, int X[], int Y[], int W[], int S[]) {
    vector<int> x, y;
    for (int i=0; i<a; i++) x.push_back(X[i]);
    for (int i=0; i<b; i++) y.push_back(Y[i]);
    sort(x.begin(), x.end());
    sort(y.begin(), y.end());
    vector<pair<int, int> > v;
    for (int i=0; i<t; i++) {
        v.emplace_back(W[i], S[i]);
        if ((x.empty() || W[i]>=x.back()) && (y.empty() || S[i]>=y.back())) return -1;
    }
    sort(v.begin(), v.end());
    reverse(y.begin(), y.end());
    int low=1, high=t, mid;
    while (low != high) {
        mid = (low+high) >> 1;
        priority_queue<int> pq;
        int cur = 0;
        for (int i : x) {
            while (cur<t && v[cur].first<i) pq.push(v[cur++].second);
            int z = min((int)pq.size(), mid);
            for (int i=0; i<z; i++) pq.pop();
        }
        for (; cur<t; cur++) pq.push(v[cur].second);
        for (int i : y) {
            int z = 0;
            while (z++<mid && !pq.empty() && pq.top()<i) pq.pop();
        }
        if (pq.empty()) high = mid;
        else low = mid+1;
    }
    return low;
}

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