Submission #97116

#	Time	Username	Problem	Language	Result	Execution time	Memory
97116		E869120	Robots (IOI13_robots)	C++14	100 / 100	1452 ms	28604 KiB

robots

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

int N, M, px[1000009], py[1000009], col[50009]; vector<int> V[50009];

bool solve(int pos) {
	priority_queue<int, vector<int>, less<int>> Q;
	for (int i = 0; i <= N; i++) {
		for (int j = 0; j < V[i].size(); j++) Q.push(V[i][j]);
		if (i == N) break;
		
		int cntv = 0;
		while (!Q.empty() && cntv < pos) {
			Q.pop(); cntv++;
		}
	}
	for (int i = 0; i <= M; i++) col[i] = 0;
	while (!Q.empty()) { col[Q.top()]++; Q.pop(); }
	
	if (col[M] >= 1) return false;
	
	long long sum = 0, L = 0;
	for (int i = M - 1; i >= 0; i--) {
		sum += pos; L += col[i];
		if (L > sum) return false;
	}
	return true;
}

int putaway(int A, int B, int T, int X[], int Y[], int W[], int S[]) {
	N = A; M = B;
    sort(X, X + A);
    sort(Y, Y + B);
    for (int i = 0; i < T; i++) {
		int pos1 = upper_bound(X, X + A, W[i]) - X; px[i] = pos1;
		int pos2 = upper_bound(Y, Y + B, S[i]) - Y; py[i] = pos2;
		if (pos1 == A && pos2 == B) return -1;
	}
	for (int i = 0; i < T; i++) V[px[i]].push_back(py[i]);
	
	int L = 1, R = 1000005, MM, minx = (1 << 30);
	for (int i = 0; i < 25; i++) {
		MM = (L + R) / 2;
		bool t = solve(MM);
		if (t == true) { R = MM; minx = min(minx, MM); }
		else { L = MM; }
	}
	return minx;
}

Compilation message (stderr)

robots.cpp: In function 'bool solve(int)':
robots.cpp:10:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for (int j = 0; j < V[i].size(); j++) Q.push(V[i][j]);
                   ~~^~~~~~~~~~~~~

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