Submission #824511

#	Time	Username	Problem	Language	Result	Execution time	Memory
824511		christinelynn	Robots (IOI13_robots)	C++17	100 / 100	1366 ms	24320 KiB

robots

#include"robots.h"
#include<bits/stdc++.h>
using namespace std;
int putaway(int a, int b, int t, int x[], int y[], int w[], int s[]) {
  vector<pair<int, int>> toy(t);
  for(int i=0; i<t; i++) toy[i]={w[i], s[i]};
  sort(toy.begin(), toy.end());
  sort(x, x+a); sort(y, y+b);
  auto can = [&](int lim) -> bool {
    int idx=0;
    priority_queue<int> pq;
    for(int i=0; i<a; i++) {
      while(idx<t && toy[idx].first<x[i]) pq.push(toy[idx++].second);
      for(int j=0; j<lim && !pq.empty(); j++) pq.pop();
    }
    while(idx<t) pq.push(toy[idx++].second);
    for(int i=b-1; i>=0; i--) {
      for(int j=0; j<lim && !pq.empty(); j++) {
        if(pq.top()>=y[i]) return 0;
        pq.pop();
      }
    }
    return pq.empty();
  };
  int l=1, r=t, ans=t+1;
  while(l<=r) {
    int mid=l+r>>1;
    if(can(mid)) r=mid-1, ans=mid;
    else l=mid+1;
  }
  return (ans<=t ? ans : -1);
}

Compilation message (stderr)

robots.cpp: In function 'int putaway(int, int, int, int*, int*, int*, int*)':
robots.cpp:27:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   27 |     int mid=l+r>>1;
      |             ~^~

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