Submission #1140512

#	Time	Username	Problem	Language	Result	Execution time	Memory
1140512		ghammazhassan	Sprinklers (CEOI24_sprinklers)	C++20	0 / 100	2 ms	320 KiB

Main

// #include <bits/stdc++.h>
#include <iostream>
#include <cmath>
#include <algorithm>
#include <map>
#include <vector>
#include <iomanip>
#include <string>
#include <queue>
#include <set>
#include <deque>
using namespace std;
#define int long long
#define endl "\n";
const int N=2e5+5;
const int M=1e9+7;
void solve()
{
	int n,m;
	cin >> n >> m;
	vector<int>a(n),b(m);
	for (int i=0;i<n;i++){
		cin >> a[i];
	}
	for (int i=0;i<m;i++){
		cin >> b[i];
	}
	if (n==1 and a[0]>b[0] and a[0]<b[m-1]){
		cout << -1 << endl;
		return;
	}
	else if (n==1){
		if (a[0]>b[0]){
			cout << a[0]-b[0] << endl;
			cout << 'L' << endl;
		}
		else{
			cout << b[m-1]-a[0] << endl;
			cout << 'R' << endl;
		}
	}
	int l=0;
	int h=b[m-1]+1;
	int mi=(l+h)/2;
	while (l<h){
		queue<int>o;
		for (int p:b){
			o.push(p);
		}
		for (int i:a){
			if (!o.empty()){
				int he=o.front();
				if (he<i){
					while (!o.empty()){
						he=o.front();
						if (he>=i-mi and he<=i){
							o.pop();
						}
						else{
							break;
						}
					}
				}
				else{
					while (!o.empty()){
						he=o.front();
						if (he<=i+mi and he>=i){
							o.pop();
						}
						else{
							break;
						}
					}
				}
			}
		}
		if (o.empty()){
			h=mi;
		}
		else{
			l=mi+1;
		}
		mi=(l+h)/2;
	}
	string s;
	queue<int>o;
	for (int p:b){
		o.push(p);
	}
	for (int i:a){
		if (!o.empty()){
			int he=o.front();
			if (he<i){
				s+='L';
				while (!o.empty()){
					he=o.front();
					if (he>=i-mi and he<=i){
						o.pop();
					}
					else{
						break;
					}
				}
			}
			else{
				s+='R';
				while (!o.empty()){
					he=o.front();
					if (he<=i+mi and he>=i){
						o.pop();
					}
					else{
						break;
					}
				}
			}
		}
		else{
			s+='R';
		}
	}
	cout << mi << endl;
	cout << s << endl;
}
signed main()
{
	#ifndef ONLINE_JUDGE
	freopen("input.txt","r",stdin);
	freopen("output.txt","w",stdout);
	#endif
    ios::sync_with_stdio(0);//DO NOT USE IN INTERACTIVE
    cin.tie(0), cout.tie(0);//DO NOT USE IN INTERACTIVE
    cout << fixed<<setprecision(9);
    int t=1;
    // cin >> t;
    for (int _=1;_<=t;_++){
    	solve();
    }
}

Compilation message (stderr)

Main.cpp: In function 'int main()':
Main.cpp:128:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  128 |         freopen("input.txt","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:129:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  129 |         freopen("output.txt","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 0: 0 / 0
• Subtask 1: 0 / 3
• Subtask 2: 0 / 6
• Subtask 3: 0 / 17
• Subtask 4: 0 / 27
• Subtask 5: 0 / 47