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Submission #1062157

# Submission time Handle Problem Language Result Execution time Memory
1062157 2024-08-16T19:57:24 Z beaconmc Sprinklers (CEOI24_sprinklers) C++14
100 / 100
 184 ms 8144 KB 
#include <bits/stdc++.h>
 
typedef long long ll;
#define FOR(i,x,y) for(ll i=x; i<y; i++)
#define FORNEG(i,x,y) for(ll i=x; i>y; i--)
 
using namespace std;
 
ll dp[100005];
string prevs[100005];
 
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	ll n,m;
	cin >> n >> m;
	FOR(i,0,n+1) dp[i] = -1;
 
	vector<ll> water(n);
	vector<ll> flower(m);
	FOR(i,0,n) cin >> water[i];
	FOR(i,0,m) cin >> flower[i];
 
	ll lo = 0, hi = 10000000000000000;
	while (lo < hi){
 
 
		FOR(i,0,n+1) dp[i] = -1;
		ll k = (lo+hi)/2;
		bool flag = false;
 
 
		FOR(i,0,n){
			ll sus = upper_bound(flower.begin(), flower.end(), dp[i]) - flower.begin();
 
			if (sus >= m || flower[sus] >= water[i]){
				if (water[i] + k > dp[i+1]){
					dp[i+1] = water[i] + k;
					prevs[i+1] = "R";
 
				}
 
			}else{
 
				if (abs(flower[sus] - water[i]) > k){
 
					flag = true;
				}
 
				if (i==n-1){
					if (water[i] > dp[i+1]){
						dp[i+1] = water[i];
						prevs[i+1] = "L";
					}
				}
				else{
					if (abs(flower[sus] - water[i+1]) > k){
						if (water[i] > dp[i+1]){
							dp[i+1] = water[i];
							prevs[i+1] = "L";
						}
 
					}else{
						if (water[i] > dp[i+1]){
							dp[i+1] = water[i];
							prevs[i+1] = "L";
						}
						ll maxi = max(water[i]+k, water[i+1]);
						if (maxi > dp[i+2]){
							dp[i+2] = maxi;
							prevs[i+2] = "LR";
						}
					}
				}
			}
		}
 
		if (dp[n] < flower[m-1]) flag = 1;
 
		if (flag==0) hi = k;
		else lo = k+1;
	}
	ll k = lo;
	FOR(i,0,n+1) dp[i] = -1;
 
 
	FOR(i,0,n){
 
		ll sus = upper_bound(flower.begin(), flower.end(), dp[i]) - flower.begin();
		//cout << dp[i] << " "<< sus << endl;
 
		if (sus >= m || flower[sus] >= water[i]){
 
			if (water[i] + k > dp[i+1]){
				dp[i+1] = water[i] + k;
				prevs[i+1] = "R";
 
			}
 
		}else{
 
 
 
			if (i==n-1){
				if (water[i] > dp[i+1]){
					dp[i+1] = water[i];
					prevs[i+1] = "L";
				}
			}
			else{
				if (abs(flower[sus] - water[i+1]) > k){
					
					if (water[i] > dp[i+1]){
						dp[i+1] = water[i];
						prevs[i+1] = "L";
					}
 
				}else{
					if (water[i] > dp[i+1]){
						dp[i+1] = water[i];
						prevs[i+1] = "L";
					}
					
					ll maxi = max(water[i]+k, water[i+1]);
					if (maxi > dp[i+2]){
 
						dp[i+2] = maxi;
						prevs[i+2] = "LR";
					}
				}
			}
		}
	}

 
 
 
	ll cur = n;
	string ans = "";
	while (cur != 0){
		ans += prevs[cur];
		cur -= prevs[cur].size();
	}
	reverse(ans.begin(), ans.end());
	if (lo == 10000000000000000) cout << -1;
	else{
		cout << lo << endl;
		cout << ans << endl;
	}
 
 
 
 
}

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3420 KB Correct
2 Correct 1 ms 3420 KB Correct

Subtask #1
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3420 KB Correct
2 Correct 6 ms 4188 KB Correct
3 Correct 1 ms 3420 KB Correct
4 Correct 7 ms 4188 KB Correct
5 Correct 7 ms 4184 KB Correct
6 Correct 1 ms 3416 KB Correct
7 Correct 1 ms 3416 KB Correct
8 Correct 2 ms 3672 KB Correct
9 Correct 1 ms 3420 KB Correct

Subtask #2
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3420 KB Correct
2 Correct 9 ms 4412 KB Correct
3 Correct 14 ms 3932 KB Correct
4 Correct 153 ms 8132 KB Correct
5 Correct 153 ms 8120 KB Correct
6 Correct 1 ms 3420 KB Correct
7 Correct 1 ms 3420 KB Correct
8 Correct 126 ms 8136 KB Correct
9 Correct 119 ms 8020 KB Correct
10 Correct 125 ms 8016 KB Correct
11 Correct 70 ms 6372 KB Correct
12 Correct 71 ms 6224 KB Correct
13 Correct 131 ms 6992 KB Correct
14 Correct 142 ms 7252 KB Correct
15 Correct 148 ms 7352 KB Correct
16 Correct 128 ms 6740 KB Correct

Subtask #3
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3420 KB Correct
2 Correct 1 ms 3420 KB Correct
3 Correct 1 ms 3420 KB Correct
4 Correct 1 ms 3420 KB Correct
5 Correct 1 ms 3420 KB Correct
6 Correct 1 ms 3420 KB Correct
7 Correct 1 ms 3420 KB Correct
8 Correct 1 ms 3420 KB Correct
9 Correct 1 ms 3416 KB Correct
10 Correct 1 ms 3420 KB Correct
11 Correct 1 ms 3424 KB Correct
12 Correct 1 ms 3420 KB Correct
13 Correct 1 ms 3420 KB Correct
14 Correct 1 ms 3420 KB Correct
15 Correct 1 ms 3424 KB Correct
16 Correct 1 ms 3420 KB Correct
17 Correct 1 ms 3420 KB Correct
18 Correct 1 ms 3420 KB Correct
19 Correct 1 ms 3420 KB Correct
20 Correct 1 ms 3420 KB Correct

Subtask #4
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3420 KB Correct
2 Correct 30 ms 4544 KB Correct
3 Correct 182 ms 8020 KB Correct
4 Correct 177 ms 8020 KB Correct
5 Correct 175 ms 8020 KB Correct
6 Correct 178 ms 8020 KB Correct
7 Correct 181 ms 8020 KB Correct
8 Correct 177 ms 8016 KB Correct
9 Correct 181 ms 8136 KB Correct
10 Correct 175 ms 8020 KB Correct
11 Correct 176 ms 8128 KB Correct
12 Correct 1 ms 3420 KB Correct
13 Correct 1 ms 3420 KB Correct
14 Correct 72 ms 6372 KB Correct
15 Correct 81 ms 6392 KB Correct
16 Correct 81 ms 6228 KB Correct
17 Correct 115 ms 6736 KB Correct
18 Correct 113 ms 6968 KB Correct
19 Correct 121 ms 7156 KB Correct
20 Correct 161 ms 7764 KB Correct
21 Correct 158 ms 7764 KB Correct
22 Correct 148 ms 7508 KB Correct
23 Correct 150 ms 7552 KB Correct
24 Correct 142 ms 7252 KB Correct
25 Correct 143 ms 7248 KB Correct
26 Correct 89 ms 6044 KB Correct
27 Correct 64 ms 5100 KB Correct
28 Correct 141 ms 7000 KB Correct
29 Correct 135 ms 6740 KB Correct
30 Correct 140 ms 6960 KB Correct
31 Correct 136 ms 7036 KB Correct

Subtask #5
47.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 3420 KB Correct
2 Correct 1 ms 3420 KB Correct
3 Correct 6 ms 4188 KB Correct
4 Correct 1 ms 3420 KB Correct
5 Correct 7 ms 4188 KB Correct
6 Correct 7 ms 4184 KB Correct
7 Correct 1 ms 3416 KB Correct
8 Correct 1 ms 3416 KB Correct
9 Correct 2 ms 3672 KB Correct
10 Correct 1 ms 3420 KB Correct
11 Correct 9 ms 4412 KB Correct
12 Correct 14 ms 3932 KB Correct
13 Correct 153 ms 8132 KB Correct
14 Correct 153 ms 8120 KB Correct
15 Correct 1 ms 3420 KB Correct
16 Correct 1 ms 3420 KB Correct
17 Correct 126 ms 8136 KB Correct
18 Correct 119 ms 8020 KB Correct
19 Correct 125 ms 8016 KB Correct
20 Correct 70 ms 6372 KB Correct
21 Correct 71 ms 6224 KB Correct
22 Correct 131 ms 6992 KB Correct
23 Correct 142 ms 7252 KB Correct
24 Correct 148 ms 7352 KB Correct
25 Correct 128 ms 6740 KB Correct
26 Correct 1 ms 3420 KB Correct
27 Correct 1 ms 3420 KB Correct
28 Correct 1 ms 3420 KB Correct
29 Correct 1 ms 3420 KB Correct
30 Correct 1 ms 3420 KB Correct
31 Correct 1 ms 3420 KB Correct
32 Correct 1 ms 3416 KB Correct
33 Correct 1 ms 3420 KB Correct
34 Correct 1 ms 3424 KB Correct
35 Correct 1 ms 3420 KB Correct
36 Correct 1 ms 3420 KB Correct
37 Correct 1 ms 3420 KB Correct
38 Correct 1 ms 3424 KB Correct
39 Correct 1 ms 3420 KB Correct
40 Correct 1 ms 3420 KB Correct
41 Correct 1 ms 3420 KB Correct
42 Correct 1 ms 3420 KB Correct
43 Correct 1 ms 3420 KB Correct
44 Correct 30 ms 4544 KB Correct
45 Correct 182 ms 8020 KB Correct
46 Correct 177 ms 8020 KB Correct
47 Correct 175 ms 8020 KB Correct
48 Correct 178 ms 8020 KB Correct
49 Correct 181 ms 8020 KB Correct
50 Correct 177 ms 8016 KB Correct
51 Correct 181 ms 8136 KB Correct
52 Correct 175 ms 8020 KB Correct
53 Correct 176 ms 8128 KB Correct
54 Correct 1 ms 3420 KB Correct
55 Correct 1 ms 3420 KB Correct
56 Correct 72 ms 6372 KB Correct
57 Correct 81 ms 6392 KB Correct
58 Correct 81 ms 6228 KB Correct
59 Correct 115 ms 6736 KB Correct
60 Correct 113 ms 6968 KB Correct
61 Correct 121 ms 7156 KB Correct
62 Correct 161 ms 7764 KB Correct
63 Correct 158 ms 7764 KB Correct
64 Correct 148 ms 7508 KB Correct
65 Correct 150 ms 7552 KB Correct
66 Correct 142 ms 7252 KB Correct
67 Correct 143 ms 7248 KB Correct
68 Correct 89 ms 6044 KB Correct
69 Correct 64 ms 5100 KB Correct
70 Correct 141 ms 7000 KB Correct
71 Correct 135 ms 6740 KB Correct
72 Correct 140 ms 6960 KB Correct
73 Correct 136 ms 7036 KB Correct
74 Correct 12 ms 5416 KB Correct
75 Correct 182 ms 8124 KB Correct
76 Correct 184 ms 7936 KB Correct
77 Correct 1 ms 3420 KB Correct
78 Correct 123 ms 8144 KB Correct
79 Correct 121 ms 8020 KB Correct
80 Correct 127 ms 8024 KB Correct
81 Correct 68 ms 6384 KB Correct
82 Correct 80 ms 6224 KB Correct
83 Correct 84 ms 6388 KB Correct
84 Correct 15 ms 4700 KB Correct
85 Correct 153 ms 7252 KB Correct
86 Correct 152 ms 7348 KB Correct
87 Correct 134 ms 7104 KB Correct
88 Correct 11 ms 5212 KB Correct
89 Correct 8 ms 5208 KB Correct