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Submission #1065316

# Submission time Handle Problem Language Result Execution time Memory
1065316 2024-08-19T06:14:15 Z Dan4Life Sprinklers (CEOI24_sprinklers) C++17
100 / 100
 73 ms 4696 KB 
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
#define sz(a) (int)a.size()
#define all(a) begin(a), end(a)
using ll = long long;
using vi = vector<int>;
using ar2 = array<int,2>;
const int mxN = (int)1e5+10;
const int INF = (int)2e9+10;
int n, m;
ar2 p[mxN];
string ans;
int f[mxN], s[mxN], dp[mxN];

bool chk(int d){
	int j = 1, k = 1, l = 1;
	for(int i = 1; i <= n; i++){
		if(f[dp[i-1]+1]<s[i]-d) return 0;
		while(j<=m and f[j]<=s[i]+d) j++;
		while(k<=m and f[k]<=s[i]) k++;
		while(l<=m and i>1 and f[l]<=s[i-1]+d) l++;
		if(f[dp[i-1]+1]>=s[i]) dp[i]=j-1, p[i]={1,1};
		else dp[i]=k-1, p[i]={1,0};
		if(i>1 and f[dp[i-2]+1]>=s[i]-d)
			if(dp[i]<l) dp[i]=l-1, p[i]={2,0};
	}
	return dp[n]==m;
}

int main(){
	ios_base::sync_with_stdio(false); cin.tie(0);
	cin >> n >> m;
	for(int i = 1; i <= n; i++) cin >> s[i], ans+='L';
	for(int i = 1; i <= m; i++) cin >> f[i]; f[m+1]=INF;
	int l = 0, r = (int)1e9;
	while(l<r){
		int mid = (l+r)/2;
		if(chk(mid)) r=mid;
		else l=mid+1;
	}
	if(!chk(l)){cout<<-1<<"\n";return 0;}
	cout << l << "\n";
	for(int i = n; i; i--){
		if(p[i][0]==2) ans[i-1]='L',ans[i-2]='R', i--;
		else ans[i-1]="LR"[p[i][1]];
	}
	cout << ans << "\n";
}

Compilation message

Main.cpp: In function 'int main()':
Main.cpp:35:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   35 |  for(int i = 1; i <= m; i++) cin >> f[i]; f[m+1]=INF;
      |  ^~~
Main.cpp:35:43: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   35 |  for(int i = 1; i <= m; i++) cin >> f[i]; f[m+1]=INF;
      |                                           ^

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 1372 KB Correct
3 Correct 0 ms 348 KB Correct
4 Correct 9 ms 1628 KB Correct
5 Correct 9 ms 1624 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 1 ms 348 KB Correct
8 Correct 2 ms 600 KB Correct
9 Correct 0 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 10 ms 1624 KB Correct
3 Correct 4 ms 604 KB Correct
4 Correct 40 ms 4580 KB Correct
5 Correct 44 ms 4444 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 22 ms 4616 KB Correct
9 Correct 25 ms 4440 KB Correct
10 Correct 39 ms 4432 KB Correct
11 Correct 17 ms 3216 KB Correct
12 Correct 22 ms 2652 KB Correct
13 Correct 36 ms 3572 KB Correct
14 Correct 37 ms 3636 KB Correct
15 Correct 37 ms 3920 KB Correct
16 Correct 33 ms 3416 KB Correct

Subtask #3
17.0 / 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 348 KB Correct
4 Correct 0 ms 348 KB Correct
5 Correct 1 ms 348 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 0 ms 600 KB Correct
9 Correct 0 ms 348 KB Correct
10 Correct 0 ms 348 KB Correct
11 Correct 0 ms 348 KB Correct
12 Correct 0 ms 348 KB Correct
13 Correct 0 ms 348 KB Correct
14 Correct 0 ms 348 KB Correct
15 Correct 0 ms 348 KB Correct
16 Correct 0 ms 344 KB Correct
17 Correct 0 ms 348 KB Correct
18 Correct 0 ms 348 KB Correct
19 Correct 0 ms 344 KB Correct
20 Correct 0 ms 348 KB Correct

Subtask #4
27.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Correct
2 Correct 15 ms 1880 KB Correct
3 Correct 68 ms 4444 KB Correct
4 Correct 68 ms 4444 KB Correct
5 Correct 67 ms 4560 KB Correct
6 Correct 70 ms 4552 KB Correct
7 Correct 68 ms 4440 KB Correct
8 Correct 72 ms 4696 KB Correct
9 Correct 73 ms 4444 KB Correct
10 Correct 73 ms 4444 KB Correct
11 Correct 69 ms 4440 KB Correct
12 Correct 0 ms 344 KB Correct
13 Correct 0 ms 348 KB Correct
14 Correct 17 ms 3228 KB Correct
15 Correct 18 ms 3164 KB Correct
16 Correct 18 ms 3164 KB Correct
17 Correct 20 ms 3160 KB Correct
18 Correct 21 ms 3396 KB Correct
19 Correct 29 ms 3676 KB Correct
20 Correct 66 ms 4176 KB Correct
21 Correct 65 ms 4176 KB Correct
22 Correct 64 ms 3960 KB Correct
23 Correct 68 ms 3928 KB Correct
24 Correct 57 ms 3676 KB Correct
25 Correct 59 ms 3676 KB Correct
26 Correct 19 ms 2832 KB Correct
27 Correct 25 ms 1880 KB Correct
28 Correct 50 ms 3420 KB Correct
29 Correct 47 ms 3416 KB Correct
30 Correct 49 ms 3500 KB Correct
31 Correct 32 ms 3420 KB Correct

Subtask #5
47.0 / 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 1372 KB Correct
4 Correct 0 ms 348 KB Correct
5 Correct 9 ms 1628 KB Correct
6 Correct 9 ms 1624 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 1 ms 348 KB Correct
9 Correct 2 ms 600 KB Correct
10 Correct 0 ms 348 KB Correct
11 Correct 10 ms 1624 KB Correct
12 Correct 4 ms 604 KB Correct
13 Correct 40 ms 4580 KB Correct
14 Correct 44 ms 4444 KB Correct
15 Correct 0 ms 348 KB Correct
16 Correct 0 ms 348 KB Correct
17 Correct 22 ms 4616 KB Correct
18 Correct 25 ms 4440 KB Correct
19 Correct 39 ms 4432 KB Correct
20 Correct 17 ms 3216 KB Correct
21 Correct 22 ms 2652 KB Correct
22 Correct 36 ms 3572 KB Correct
23 Correct 37 ms 3636 KB Correct
24 Correct 37 ms 3920 KB Correct
25 Correct 33 ms 3416 KB Correct
26 Correct 0 ms 348 KB Correct
27 Correct 0 ms 348 KB Correct
28 Correct 1 ms 348 KB Correct
29 Correct 0 ms 348 KB Correct
30 Correct 0 ms 348 KB Correct
31 Correct 0 ms 600 KB Correct
32 Correct 0 ms 348 KB Correct
33 Correct 0 ms 348 KB Correct
34 Correct 0 ms 348 KB Correct
35 Correct 0 ms 348 KB Correct
36 Correct 0 ms 348 KB Correct
37 Correct 0 ms 348 KB Correct
38 Correct 0 ms 348 KB Correct
39 Correct 0 ms 344 KB Correct
40 Correct 0 ms 348 KB Correct
41 Correct 0 ms 348 KB Correct
42 Correct 0 ms 344 KB Correct
43 Correct 0 ms 348 KB Correct
44 Correct 15 ms 1880 KB Correct
45 Correct 68 ms 4444 KB Correct
46 Correct 68 ms 4444 KB Correct
47 Correct 67 ms 4560 KB Correct
48 Correct 70 ms 4552 KB Correct
49 Correct 68 ms 4440 KB Correct
50 Correct 72 ms 4696 KB Correct
51 Correct 73 ms 4444 KB Correct
52 Correct 73 ms 4444 KB Correct
53 Correct 69 ms 4440 KB Correct
54 Correct 0 ms 344 KB Correct
55 Correct 0 ms 348 KB Correct
56 Correct 17 ms 3228 KB Correct
57 Correct 18 ms 3164 KB Correct
58 Correct 18 ms 3164 KB Correct
59 Correct 20 ms 3160 KB Correct
60 Correct 21 ms 3396 KB Correct
61 Correct 29 ms 3676 KB Correct
62 Correct 66 ms 4176 KB Correct
63 Correct 65 ms 4176 KB Correct
64 Correct 64 ms 3960 KB Correct
65 Correct 68 ms 3928 KB Correct
66 Correct 57 ms 3676 KB Correct
67 Correct 59 ms 3676 KB Correct
68 Correct 19 ms 2832 KB Correct
69 Correct 25 ms 1880 KB Correct
70 Correct 50 ms 3420 KB Correct
71 Correct 47 ms 3416 KB Correct
72 Correct 49 ms 3500 KB Correct
73 Correct 32 ms 3420 KB Correct
74 Correct 11 ms 1880 KB Correct
75 Correct 61 ms 4504 KB Correct
76 Correct 73 ms 4444 KB Correct
77 Correct 0 ms 344 KB Correct
78 Correct 19 ms 4440 KB Correct
79 Correct 42 ms 4568 KB Correct
80 Correct 24 ms 4444 KB Correct
81 Correct 17 ms 3164 KB Correct
82 Correct 18 ms 3164 KB Correct
83 Correct 18 ms 3276 KB Correct
84 Correct 9 ms 1112 KB Correct
85 Correct 50 ms 3676 KB Correct
86 Correct 55 ms 3904 KB Correct
87 Correct 34 ms 3520 KB Correct
88 Correct 15 ms 1816 KB Correct
89 Correct 9 ms 1628 KB Correct