oj.uz

Submission #1087776

# Submission time Handle Problem Language Result Execution time Memory
1087776 2024-09-13T08:28:33 Z mychecksedad Sprinklers (CEOI24_sprinklers) C++17
9 / 100
 165 ms 5168 KB 
#include<bits/stdc++.h>
using namespace std;
#define ll long long int
#define pb push_back
#define en cout << '\n'
#define vi vector<int>
#define pii pair<int, int>
#define ff first
#define ss second
#define all(x) x.begin(),x.end()
const int N = 1e5+100;


int n, m, a[N], b[N];
int get(int l, int r){
	if(r < l) return 0;
	return upper_bound(b+1, b+1+m, r) - lower_bound(b+1, b+1+m, l);
}
void solve(){
	cin >> n >> m;
	vector<pii> v;
	for(int i = 1; i <= n; ++i){
		cin >> a[i];
		v.pb({a[i], 1});
	}
	for(int i = 1; i <= m; ++i){
		cin >> b[i];
		v.pb({b[i], 0});
	}
	sort(all(v));
	string soll;
	int l = 0, r = 1e9, ans = -1;
	while(l <= r){
		int k = l+r>>1;
		string sol = "";
		bool ok = 1;
		int last_covered = -2e9;
		for(int i = 1; i <= n; ++i){
			if(last_covered >= a[i] - 1){
				sol += 'R';
				last_covered = a[i] + k;
				continue;
			}
			if(get(last_covered + 1, a[i] - 1) > get(a[i] - k, a[i] - 1)){
				ok = 0;
				break;
			}
			if(get(last_covered + 1, a[i] - 1) > 0){
				if(i + 1 <= n && get(a[i] + 1, min(a[i + 1] - 1, a[i] + k)) == 0){
					sol += 'L';
					last_covered = a[i];
				}else if(i + 1 <= n && get(a[i] + 1, min(a[i + 1] - 1, a[i] + k)) > 0){
					if(a[i + 1] - k < a[i] && get(last_covered + 1, a[i] - 1) == get(a[i + 1] - k, a[i] - 1)){
						sol += 'R';
						sol += 'L';
						last_covered = a[i] + k;
						++i;
						continue;
					}else{
						sol += 'L';
						sol += 'L';
						last_covered = a[i + 1];
						++i;
						if(a[i + 1] - k > a[i] && get(a[i] + 1, a[i + 1] - k) > 0){
							ok = 0;
							break;
						}
						continue;
					}
				}else{
					sol += 'L';
					last_covered = a[i];
				}
			}else{
				sol += 'R';
				last_covered = a[i] + k;
			}
		}
		if(b[m] > last_covered) ok = 0;


		if(ok){
			ans = k;
			soll = sol;
			r = k - 1;
		}else{
			l = k + 1;
		}
	}

	cout << ans << '\n';
	if(ans != -1){
		cout << soll;
	}
}

int main(){
	cin.tie(0); ios::sync_with_stdio(0);
	solve();
	return 0;
}

Compilation message

Main.cpp: In function 'void solve()':
Main.cpp:34:12: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   34 |   int k = l+r>>1;
      |           ~^~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Correct
2 Correct 0 ms 348 KB Correct

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Correct
2 Correct 8 ms 2524 KB Correct
3 Correct 0 ms 348 KB Correct
4 Correct 10 ms 2780 KB Correct
5 Correct 9 ms 2780 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 2 ms 1112 KB Correct
9 Correct 1 ms 348 KB Correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Correct
2 Correct 15 ms 2776 KB Correct
3 Correct 3 ms 860 KB Correct
4 Correct 36 ms 5144 KB Correct
5 Correct 36 ms 5060 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 0 ms 472 KB Correct
8 Correct 24 ms 5092 KB Correct
9 Correct 25 ms 5068 KB Correct
10 Correct 38 ms 5168 KB Correct
11 Correct 18 ms 3020 KB Correct
12 Correct 22 ms 3304 KB Correct
13 Correct 32 ms 4056 KB Correct
14 Correct 36 ms 4308 KB Correct
15 Correct 48 ms 4312 KB Correct
16 Correct 28 ms 4052 KB Correct

Subtask #3
0.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Correct
2 Correct 0 ms 348 KB Correct
3 Correct 0 ms 344 KB Correct
4 Correct 0 ms 344 KB Correct
5 Incorrect 0 ms 348 KB User solution is worse than jury's solution
6 Halted 0 ms 0 KB -

Subtask #4
0.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Correct
2 Correct 46 ms 2944 KB Correct
3 Incorrect 165 ms 5060 KB User solution is worse than jury's solution
4 Halted 0 ms 0 KB -

Subtask #5
0.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Correct
2 Correct 0 ms 348 KB Correct
3 Correct 8 ms 2524 KB Correct
4 Correct 0 ms 348 KB Correct
5 Correct 10 ms 2780 KB Correct
6 Correct 9 ms 2780 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 0 ms 348 KB Correct
9 Correct 2 ms 1112 KB Correct
10 Correct 1 ms 348 KB Correct
11 Correct 15 ms 2776 KB Correct
12 Correct 3 ms 860 KB Correct
13 Correct 36 ms 5144 KB Correct
14 Correct 36 ms 5060 KB Correct
15 Correct 0 ms 348 KB Correct
16 Correct 0 ms 472 KB Correct
17 Correct 24 ms 5092 KB Correct
18 Correct 25 ms 5068 KB Correct
19 Correct 38 ms 5168 KB Correct
20 Correct 18 ms 3020 KB Correct
21 Correct 22 ms 3304 KB Correct
22 Correct 32 ms 4056 KB Correct
23 Correct 36 ms 4308 KB Correct
24 Correct 48 ms 4312 KB Correct
25 Correct 28 ms 4052 KB Correct
26 Correct 0 ms 344 KB Correct
27 Correct 0 ms 344 KB Correct
28 Incorrect 0 ms 348 KB User solution is worse than jury's solution
29 Halted 0 ms 0 KB -