// -------------------- Includes -------------------- //
#define _CRT_SECURE_NO_WARNINGS
#define _USE_MATH_DEFINES
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <stdio.h>
#include <cstdlib>
#include <stdlib.h>
#include <array>
#include <string>
#include <cstring>
#include <algorithm>
#include <cmath>
#include <math.h>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <vector>
#include <stack>
#include <queue>
#include <deque>
#include <bitset>
#include <list>
#include <iterator>
#include <numeric>
#include <complex>
#include <tuple>
#include <utility>
#include <cassert>
#include <assert.h>
#include <climits>
#include <limits.h>
#include <ctime>
#include <time.h>
#include <random>
#include <chrono>
#include <fstream>
using namespace std;
// -------------------- Typedefs -------------------- //
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef long double ld;
// -------------------- Defines -------------------- //
#define pr pair
#define mpr make_pair
#define first
#define ss second
#define mset multiset
#define mmap multimap
#define uset unordered_set
#define umap unordered_map
#define umset unordered_multiset
#define ummap unordered_multimap
#define pqueue priority_queue
#define sz(x) (int((x).size()))
#define len(x) (int((x).length()))
#define all(x) (x).begin(), (x).end()
#define clr(x) (x).clear()
#define ft front
#define bk back
#define pf push_front
#define pb push_back
#define popf pop_front
#define popb pop_back
#define lb lower_bound
#define ub upper_bound
#define bs binary_search
// -------------------- Constants -------------------- //
const int MAX = int(1e9 + 5);
const ll MAXL = ll(1e18 + 5);
const ll MOD = ll(1e9 + 7);
const ll MOD2 = ll(998244353);
// -------------------- Functions -------------------- //
void fastio()
{
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
return;
}
void precision(int x)
{
cout << fixed << setprecision(x);
return;
}
ll gcd0(ll a, ll b)
{
while (b) {
a %= b;
swap(a, b);
}
return a;
}
ll lcm0(ll a, ll b)
{
return a / gcd0(a, b) * b;
}
bool is_prime(ll a)
{
if (a == 1) return false;
for (ll i = 2; i * i <= a; i++) if (a % i == 0) return false;
return true;
}
bool is_square(ll a)
{
ll b = ll(sqrtl(ld(a)));
return (b * b == a);
}
bool is_cube(ll a)
{
ll b = ll(cbrtl(ld(a)));
return (b * b * b == a);
}
int digit_sum(ll a)
{
int sum = 0;
while (a) {
sum += int(a % 10);
a /= 10;
}
return sum;
}
ll binpow(ll a, int b)
{
ll ans = 1;
while (b) {
if (b & 1) ans *= a;
b >>= 1;
a *= a;
}
return ans;
}
ll binpow_mod(ll a, ll b, ll mod)
{
ll ans = 1;
while (b) {
if (b & 1) ans = (ans * a) % mod;
b >>= 1;
a = (a * a) % mod;
}
return ans;
}
ll factorial(int a)
{
ll ans = 1;
for (int i = 2; i <= a; i++) ans *= ll(i);
return ans;
}
ll factorial_mod(int a, ll mod)
{
ll ans = 1;
for (int i = 2; i <= a; i++) ans = (ans * ll(i)) % mod;
return ans;
}
// -------------------- Solution -------------------- //
const int N = 100005, M = 100005;
int a[N], b[M];
int ans[N];
int n, m;
int dp[N];
int from[N];
bool covers(int l, int r, int e) { return (l <= b[e] && b[e] <= r); }
bool check(int h)
{
int i, j;
for (i = 0; i <= n; i++) {
dp[i] = 0;
from[i] = -1;
}
dp[0] = 1;
for (i = 0; i < n; i++) {
if (dp[i + 1] < dp[i]) {
dp[i + 1] = dp[i];
from[i + 1] = 0;
}
if (covers(a[i + 1] - h, a[i + 1], dp[i])) {
j = ub(b + 1, b + m + 1, a[i + 1]) - b;
if (dp[i + 1] < j) {
dp[i + 1] = j;
from[i + 1] = 1;
}
}
if (covers(a[i + 1], a[i + 1] + h, dp[i])) {
j = ub(b + 1, b + m + 1, a[i + 1] + h) - b;
if (dp[i + 1] < j) {
dp[i + 1] = j;
from[i + 1] = 2;
}
}
if (i + 2 <= n && a[i + 2] - a[i + 1] < h && covers(a[i + 2] - h, a[i + 1] + h, dp[i])) {
j = ub(b + 1, b + m + 1, a[i + 1] + h) - b;
if (dp[i + 2] < j) {
dp[i + 2] = j;
from[i + 2] = 3;
}
}
}
return (dp[n] == m + 1);
}
void solve()
{
int i, j;
cin >> n >> m;
for (i = 1; i <= n; i++) cin >> a[i];
for (i = 1; i <= m; i++) {
cin >> b[i];
if (i > 1 && b[i] == b[i - 1]) {
i--;
m--;
}
}
if (n == 1) {
if (a[1] <= b[1]) cout << b[m] - a[1] << "\nR\n";
else if (b[m] <= a[1]) cout << a[1] - b[1] << "\nL\n";
else cout << "-1\n";
return;
}
int l = 0, r = 1e9, mid;
while (l < r) {
mid = (l + r) / 2;
if (check(mid)) r = mid;
else l = mid + 1;
}
check(l);
i = n;
while (i) {
if (from[i] == -1) assert(false);
if (from[i] <= 1) {
ans[i] = -1;
i--;
}
else if (from[i] == 2) {
ans[i] = 1;
i--;
}
else {
ans[i] = -1;
ans[i - 1] = 1;
i -= 2;
}
}
cout << l << "\n";
for (i = 1; i <= n; i++) {
if (ans[i] == 0) i /= a[1];
cout << (ans[i] == -1 ? 'L' : 'R');
}
cout << "\n";
return;
}
void precalc()
{
return;
}
int main()
{
fastio();
precalc();
int tests = 1, tc;
//cin >> tests;
for (tc = 1; tc <= tests; tc++) {
solve();
}
return 0;
}
/*
# # # # # # # # # # # # # # # # #
# # # # # # # # # #
# # # # # # # # # # # # #
# # # # # # # # # # # #
# # # # # # # # # # # # # #
*/
Compilation message
Main.cpp: In function 'void solve()':
Main.cpp:245:9: warning: unused variable 'j' [-Wunused-variable]
245 | int i, j;
| ^
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Correct |
2 |
Correct |
0 ms |
344 KB |
Correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Correct |
2 |
Correct |
7 ms |
604 KB |
Correct |
3 |
Correct |
0 ms |
348 KB |
Correct |
4 |
Correct |
6 ms |
760 KB |
Correct |
5 |
Correct |
6 ms |
856 KB |
Correct |
6 |
Correct |
1 ms |
344 KB |
Correct |
7 |
Correct |
0 ms |
348 KB |
Correct |
8 |
Correct |
1 ms |
348 KB |
Correct |
9 |
Correct |
0 ms |
348 KB |
Correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Correct |
2 |
Correct |
7 ms |
604 KB |
Correct |
3 |
Correct |
6 ms |
604 KB |
Correct |
4 |
Correct |
62 ms |
2276 KB |
Correct |
5 |
Correct |
68 ms |
2272 KB |
Correct |
6 |
Correct |
1 ms |
348 KB |
Correct |
7 |
Correct |
0 ms |
348 KB |
Correct |
8 |
Correct |
46 ms |
1972 KB |
Correct |
9 |
Correct |
42 ms |
2128 KB |
Correct |
10 |
Correct |
46 ms |
2172 KB |
Correct |
11 |
Correct |
15 ms |
1880 KB |
Correct |
12 |
Correct |
32 ms |
1364 KB |
Correct |
13 |
Correct |
73 ms |
2132 KB |
Correct |
14 |
Correct |
70 ms |
2140 KB |
Correct |
15 |
Correct |
60 ms |
2128 KB |
Correct |
16 |
Correct |
68 ms |
2128 KB |
Correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Correct |
2 |
Correct |
0 ms |
344 KB |
Correct |
3 |
Correct |
1 ms |
344 KB |
Correct |
4 |
Correct |
0 ms |
348 KB |
Correct |
5 |
Correct |
0 ms |
348 KB |
Correct |
6 |
Correct |
0 ms |
476 KB |
Correct |
7 |
Correct |
0 ms |
348 KB |
Correct |
8 |
Correct |
1 ms |
348 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 |
1 ms |
348 KB |
Correct |
14 |
Correct |
0 ms |
348 KB |
Correct |
15 |
Correct |
0 ms |
344 KB |
Correct |
16 |
Correct |
0 ms |
348 KB |
Correct |
17 |
Correct |
0 ms |
348 KB |
Correct |
18 |
Correct |
0 ms |
348 KB |
Correct |
19 |
Correct |
0 ms |
348 KB |
Correct |
20 |
Correct |
0 ms |
348 KB |
Correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Correct |
2 |
Correct |
24 ms |
836 KB |
Correct |
3 |
Correct |
105 ms |
3520 KB |
Correct |
4 |
Correct |
108 ms |
4176 KB |
Correct |
5 |
Correct |
108 ms |
4160 KB |
Correct |
6 |
Correct |
103 ms |
4224 KB |
Correct |
7 |
Correct |
110 ms |
4176 KB |
Correct |
8 |
Correct |
107 ms |
4172 KB |
Correct |
9 |
Correct |
106 ms |
4172 KB |
Correct |
10 |
Correct |
104 ms |
4172 KB |
Correct |
11 |
Correct |
107 ms |
4176 KB |
Correct |
12 |
Correct |
0 ms |
348 KB |
Correct |
13 |
Correct |
0 ms |
348 KB |
Correct |
14 |
Correct |
17 ms |
2904 KB |
Correct |
15 |
Correct |
17 ms |
2908 KB |
Correct |
16 |
Correct |
17 ms |
2908 KB |
Correct |
17 |
Correct |
38 ms |
2640 KB |
Correct |
18 |
Correct |
43 ms |
2640 KB |
Correct |
19 |
Correct |
59 ms |
2900 KB |
Correct |
20 |
Correct |
112 ms |
3788 KB |
Correct |
21 |
Correct |
109 ms |
3924 KB |
Correct |
22 |
Correct |
111 ms |
3668 KB |
Correct |
23 |
Correct |
114 ms |
3568 KB |
Correct |
24 |
Correct |
116 ms |
3408 KB |
Correct |
25 |
Correct |
101 ms |
3264 KB |
Correct |
26 |
Correct |
30 ms |
2652 KB |
Correct |
27 |
Correct |
37 ms |
1876 KB |
Correct |
28 |
Correct |
97 ms |
3408 KB |
Correct |
29 |
Correct |
92 ms |
3044 KB |
Correct |
30 |
Correct |
102 ms |
3156 KB |
Correct |
31 |
Correct |
112 ms |
3264 KB |
Correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
344 KB |
Correct |
2 |
Correct |
0 ms |
344 KB |
Correct |
3 |
Correct |
7 ms |
604 KB |
Correct |
4 |
Correct |
0 ms |
348 KB |
Correct |
5 |
Correct |
6 ms |
760 KB |
Correct |
6 |
Correct |
6 ms |
856 KB |
Correct |
7 |
Correct |
1 ms |
344 KB |
Correct |
8 |
Correct |
0 ms |
348 KB |
Correct |
9 |
Correct |
1 ms |
348 KB |
Correct |
10 |
Correct |
0 ms |
348 KB |
Correct |
11 |
Correct |
7 ms |
604 KB |
Correct |
12 |
Correct |
6 ms |
604 KB |
Correct |
13 |
Correct |
62 ms |
2276 KB |
Correct |
14 |
Correct |
68 ms |
2272 KB |
Correct |
15 |
Correct |
1 ms |
348 KB |
Correct |
16 |
Correct |
0 ms |
348 KB |
Correct |
17 |
Correct |
46 ms |
1972 KB |
Correct |
18 |
Correct |
42 ms |
2128 KB |
Correct |
19 |
Correct |
46 ms |
2172 KB |
Correct |
20 |
Correct |
15 ms |
1880 KB |
Correct |
21 |
Correct |
32 ms |
1364 KB |
Correct |
22 |
Correct |
73 ms |
2132 KB |
Correct |
23 |
Correct |
70 ms |
2140 KB |
Correct |
24 |
Correct |
60 ms |
2128 KB |
Correct |
25 |
Correct |
68 ms |
2128 KB |
Correct |
26 |
Correct |
1 ms |
344 KB |
Correct |
27 |
Correct |
0 ms |
348 KB |
Correct |
28 |
Correct |
0 ms |
348 KB |
Correct |
29 |
Correct |
0 ms |
476 KB |
Correct |
30 |
Correct |
0 ms |
348 KB |
Correct |
31 |
Correct |
1 ms |
348 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 |
1 ms |
348 KB |
Correct |
37 |
Correct |
0 ms |
348 KB |
Correct |
38 |
Correct |
0 ms |
344 KB |
Correct |
39 |
Correct |
0 ms |
348 KB |
Correct |
40 |
Correct |
0 ms |
348 KB |
Correct |
41 |
Correct |
0 ms |
348 KB |
Correct |
42 |
Correct |
0 ms |
348 KB |
Correct |
43 |
Correct |
0 ms |
348 KB |
Correct |
44 |
Correct |
24 ms |
836 KB |
Correct |
45 |
Correct |
105 ms |
3520 KB |
Correct |
46 |
Correct |
108 ms |
4176 KB |
Correct |
47 |
Correct |
108 ms |
4160 KB |
Correct |
48 |
Correct |
103 ms |
4224 KB |
Correct |
49 |
Correct |
110 ms |
4176 KB |
Correct |
50 |
Correct |
107 ms |
4172 KB |
Correct |
51 |
Correct |
106 ms |
4172 KB |
Correct |
52 |
Correct |
104 ms |
4172 KB |
Correct |
53 |
Correct |
107 ms |
4176 KB |
Correct |
54 |
Correct |
0 ms |
348 KB |
Correct |
55 |
Correct |
0 ms |
348 KB |
Correct |
56 |
Correct |
17 ms |
2904 KB |
Correct |
57 |
Correct |
17 ms |
2908 KB |
Correct |
58 |
Correct |
17 ms |
2908 KB |
Correct |
59 |
Correct |
38 ms |
2640 KB |
Correct |
60 |
Correct |
43 ms |
2640 KB |
Correct |
61 |
Correct |
59 ms |
2900 KB |
Correct |
62 |
Correct |
112 ms |
3788 KB |
Correct |
63 |
Correct |
109 ms |
3924 KB |
Correct |
64 |
Correct |
111 ms |
3668 KB |
Correct |
65 |
Correct |
114 ms |
3568 KB |
Correct |
66 |
Correct |
116 ms |
3408 KB |
Correct |
67 |
Correct |
101 ms |
3264 KB |
Correct |
68 |
Correct |
30 ms |
2652 KB |
Correct |
69 |
Correct |
37 ms |
1876 KB |
Correct |
70 |
Correct |
97 ms |
3408 KB |
Correct |
71 |
Correct |
92 ms |
3044 KB |
Correct |
72 |
Correct |
102 ms |
3156 KB |
Correct |
73 |
Correct |
112 ms |
3264 KB |
Correct |
74 |
Correct |
10 ms |
1628 KB |
Correct |
75 |
Correct |
94 ms |
4200 KB |
Correct |
76 |
Correct |
116 ms |
4196 KB |
Correct |
77 |
Correct |
0 ms |
348 KB |
Correct |
78 |
Correct |
31 ms |
4124 KB |
Correct |
79 |
Correct |
39 ms |
3988 KB |
Correct |
80 |
Correct |
29 ms |
4176 KB |
Correct |
81 |
Correct |
15 ms |
2904 KB |
Correct |
82 |
Correct |
18 ms |
2864 KB |
Correct |
83 |
Correct |
17 ms |
2876 KB |
Correct |
84 |
Correct |
13 ms |
1112 KB |
Correct |
85 |
Correct |
101 ms |
3424 KB |
Correct |
86 |
Correct |
90 ms |
3532 KB |
Correct |
87 |
Correct |
117 ms |
3248 KB |
Correct |
88 |
Correct |
6 ms |
1624 KB |
Correct |
89 |
Correct |
7 ms |
1624 KB |
Correct |