Submission #235650

#	Time	Username	Problem	Language	Result	Execution time	Memory
235650		crossing0ver	Robots (IOI13_robots)	C++17	100 / 100	1843 ms	29988 KiB

robots

#include<bits/stdc++.h>
#define ll long long
#define ld long double
#include "robots.h"
using namespace std;
int a,b,t,X[50001],Y[50001],W[1000001],S[1000001], flag = 1;
vector<pair<int,int> > f;
void count_max() {
	int mxW = 0;
	int mxS = 0;
	for (int i = 0; i < a; i++) mxW = max (mxW,X[i]);
	for (int i = 0; i < b; i++) mxS = max (mxS,Y[i]);
	for (int i = 0; i < t; i++) 
		if (W[i] >= mxW && S[i] >= mxS) flag = 0;
}
bool solve (int d) {
	int ptr = 0;
	priority_queue<int> pq;
	for (int i = 0; i < a; i++) {
		int s = d;
		while (ptr < t && X[i] > f[ptr].first) {
			pq.push (f[ptr].second),ptr++;
		}
		while (s && !pq.empty()) {
			pq.pop(),s--;
		} 
	}
	vector <int> v;
	while (!pq.empty()) {
		v.push_back(pq.top());
		pq.pop();
	}
	for (; ptr < t; ptr ++) v.push_back(f[ptr].second);
	sort (v.begin(),v.end());
	ptr = ((int)v.size()) - 1;
	for (int i = b-1; i >= 0; i--) {
		int s = d;
		while (ptr >= 0 && s && Y[i] > v[ptr]) ptr--,s--;	
	}
	if (ptr <0) return 1;
	return 0;
}
 
int putaway(int A1, int B1, int T1, int X1[], int Y1[], int W1[], int S1[]) {
	a = A1; b = B1; t = T1;
	for (int i = 0; i < a; i++) X[i] = X1[i];
	for (int i = 0; i < b; i++) Y[i] = Y1[i];
	for (int i = 0; i < t; i++) W[i] = W1[i], S[i] = S1[i],f.push_back({W[i],S[i]});
	sort (X, X + a);
	sort (Y, Y + b);
	count_max();
	if (!flag) return -1;
	sort (f.begin(),f.end());
	int l = 0, r = t;
	while (l != r) {
		int m = (l + r)/2;
		if (solve(m)) r = m;
		else l = m + 1;
	}
	return r;
}

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