oj.uz

Submission #1087781

# Submission time Handle Problem Language Result Execution time Memory
1087781 2024-09-13T08:35:14 Z mychecksedad Sprinklers (CEOI24_sprinklers) C++17
9 / 100
 172 ms 5140 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];
						// if(a[i + 1] - k > a[i] && get(a[i] + 1, a[i + 1] - k) > 0){
						// 	ok = 0;
						// 	break;
						// }
						++i;
						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 0 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 7 ms 1756 KB Correct
3 Correct 0 ms 348 KB Correct
4 Correct 8 ms 1756 KB Correct
5 Correct 15 ms 1756 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 2 ms 860 KB Correct
9 Correct 0 ms 348 KB Correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Correct
2 Correct 19 ms 1764 KB Correct
3 Correct 3 ms 604 KB Correct
4 Correct 34 ms 3044 KB Correct
5 Correct 35 ms 3032 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 23 ms 3020 KB Correct
9 Correct 24 ms 3176 KB Correct
10 Correct 37 ms 3032 KB Correct
11 Correct 17 ms 2008 KB Correct
12 Correct 16 ms 2004 KB Correct
13 Correct 33 ms 3032 KB Correct
14 Correct 35 ms 3028 KB Correct
15 Correct 50 ms 3032 KB Correct
16 Correct 27 ms 3028 KB Correct

Subtask #3
0.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Correct
2 Correct 0 ms 348 KB Correct
3 Correct 0 ms 348 KB Correct
4 Correct 0 ms 348 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 0 ms 348 KB Correct
2 Correct 44 ms 1752 KB Correct
3 Correct 172 ms 3032 KB Correct
4 Correct 170 ms 5072 KB Correct
5 Correct 168 ms 5136 KB Correct
6 Correct 166 ms 5140 KB Correct
7 Correct 172 ms 5136 KB Correct
8 Incorrect 90 ms 5068 KB User solution is worse than jury's solution
9 Halted 0 ms 0 KB -

Subtask #5
0.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Correct
2 Correct 0 ms 348 KB Correct
3 Correct 7 ms 1756 KB Correct
4 Correct 0 ms 348 KB Correct
5 Correct 8 ms 1756 KB Correct
6 Correct 15 ms 1756 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 0 ms 348 KB Correct
9 Correct 2 ms 860 KB Correct
10 Correct 0 ms 348 KB Correct
11 Correct 19 ms 1764 KB Correct
12 Correct 3 ms 604 KB Correct
13 Correct 34 ms 3044 KB Correct
14 Correct 35 ms 3032 KB Correct
15 Correct 0 ms 348 KB Correct
16 Correct 0 ms 348 KB Correct
17 Correct 23 ms 3020 KB Correct
18 Correct 24 ms 3176 KB Correct
19 Correct 37 ms 3032 KB Correct
20 Correct 17 ms 2008 KB Correct
21 Correct 16 ms 2004 KB Correct
22 Correct 33 ms 3032 KB Correct
23 Correct 35 ms 3028 KB Correct
24 Correct 50 ms 3032 KB Correct
25 Correct 27 ms 3028 KB Correct
26 Correct 0 ms 348 KB Correct
27 Correct 0 ms 348 KB Correct
28 Incorrect 0 ms 348 KB User solution is worse than jury's solution
29 Halted 0 ms 0 KB -