#define _CRT_SECURE_NO_WARNINGS
#include <iostream>
#include <iomanip>
#include <array>
#include <string>
#include <algorithm>
#include <cmath>
#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 <utility>
#include <random>
#include <cassert>
#include <fstream>
using namespace std;
mt19937_64 rnd(7069);
/* -------------------- Typedefs -------------------- */
typedef int itn;
typedef long long ll;
typedef unsigned long long ull;
typedef double db;
typedef float fl;
typedef long double ld;
/* -------------------- Usings -------------------- */
using vi = vector<int>;
using vll = vector<ll>;
using mii = map<int, int>;
using mll = map<ll, ll>;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
/* -------------------- Defines -------------------- */
#define ff first
#define ss second
#define pub push_back
#define pob pop_back
#define puf push_front
#define pof pop_front
#define mpr make_pair
#define yes cout<<"YES\n"
#define no cout<<"NO\n"
#define all(x) (x).begin(), (x).end()
#define USACO freopen("feast.in", "r", stdin); freopen("feast.out", "w", stdout);
/* -------------------- Constants -------------------- */
const int dx[8] = { -1, 0, 1, 0, -1, -1, 1, 1 };
const int dy[8] = { 0, -1, 0, 1, -1, 1, -1, 1 };
const int MAX = int(1e9 + 5);
const ll MAXL = ll(1e18) + 5ll;
const ll MOD = ll(1000000007);
const ll MOD2 = ll(998244353);
/* -------------------- Functions -------------------- */
void fastio() {
ios_base::sync_with_stdio(false);
cin.tie(0);
cout.tie(0);
}
void precision(int x) {
cout.setf(ios::fixed | ios::showpoint);
cout.precision(x);
}
ll gcd(ll a, ll b) {
if (a == 0 || b == 0) return(max(a, b));
while (b) {
a %= b;
swap(a, b);
}
return a;
}
ll lcm(ll a, ll b) {
return a / gcd(a, b) * b;
}
ll range_sum(ll a, ll b) {
if (a > b) return 0ll;
ll dif = a - 1, cnt = b - a + 1;
ll ans = ((b - a + 1) * (b - a + 2)) / 2;
ans += ((b - a + 1) * dif);
return ans;
}
string dec_to_bin(ll a) {
string s = "";
for (ll i = a; i > 0; ) {
ll k = i % 2;
i /= 2;
char c = k + 48;
s += c;
}
if (a == 0) {
s = "0";
}
reverse(all(s));
return s;
}
ll bin_to_dec(string s) {
ll num = 0;
for (int i = 0; i < s.size(); i++) {
num *= 2ll;
num += (s[i] - '0');
}
return num;
}
ll factorial_by_mod(ll n, ll mod) {
ll ans = 1;
ll num;
for (ll i = 1; i <= n; ++i) {
num = i % mod;
ans *= num;
ans %= mod;
}
return ans;
}
bool isPrime(ll a) {
if (a == 1) return false;
for (ll i = 2; i * i <= a; i++) {
if (a % i == 0) return false;
}
return true;
}
ll binpow(ll a, ll b) {
if (!a) return 0;
ll ans = 1;
while (b) {
if (b & 1) {
ans *= a;
}
b >>= 1;
a *= a;
}
return ans;
}
ll binpow_by_mod(ll a, ll b, ll mod) {
if (!a) return 0;
ll ans = 1;
while (b) {
if (b & 1) {
ans *= a;
ans %= mod;
}
b >>= 1;
a *= a;
a %= mod;
}
return ans;
}
/* -------------------- Solution -------------------- */
const int N = 100005;
int s[N], f[N], dp[N], from[N], type[N];
int n, m;
// 1 -> L, 2 -> R, 3 -> RL
void slv() {
cin >> n >> m;
++n;
for (int i = 2; i <= n; ++i) {
cin >> s[i];
}
for (int i = 1; i <= m; ++i) {
cin >> f[i];
}
int l = 0, r = 1e9, mid, lx, rx, ans = MAX;
while (l <= r) {
mid = (l + r) / 2;
for (int i = 2; i <= n; ++i) {
dp[i] = 0;
lx = s[i] - mid, rx = s[i];
int ind = dp[i - 1] + 1;
while (ind <= m && f[ind] >= lx && f[ind] <= rx) {
++ind;
}
if (ind - 1 > dp[i]) {
dp[i] = ind - 1;
type[i] = 1;
from[i] = i - 1;
}
ind = dp[i - 1] + 1;
lx = s[i], rx = s[i] + mid;
while (ind <= m && f[ind] >= lx && f[ind] <= rx) {
++ind;
}
if (ind - 1 > dp[i]) {
dp[i] = ind - 1;
type[i] = 2;
from[i] = i - 1;
}
if (i == 2 || (s[i] - mid) >= s[i - 1] || (s[i - 1] + mid) <= s[i]) continue;
ind = dp[i - 2] + 1;
lx = s[i] - mid, rx = s[i - 1] + mid;
while (ind <= m && f[ind] >= lx && f[ind] <= rx) {
++ind;
}
if (ind - 1 > dp[i]) {
dp[i] = ind - 1;
type[i] = 3;
from[i] = i - 2;
}
}
if (dp[n] == m) {
r = mid - 1;
ans = mid;
}
else {
l = mid + 1;
}
}
if (ans == MAX) {
int x = 1;
cout << -1;
return;
}
cout << ans + 1 << '\n';
string answ;
int ind = n;
while (ind >= 2) {
if (type[ind] == 3) {
answ += "LR";
}
else if (type[ind] == 2) {
answ += "R";
}
else {
answ += "L";
}
ind = from[ind];
}
reverse(all(answ));
cout << answ;
}
void cs() {
int tstc = 1;
//cin >> tstc;
while (tstc--) {
slv();
}
}
void precalc() {
return;
}
int main() {
fastio();
precalc();
//precision(0);
cs();
return 0;
}
Compilation message
Main.cpp: In function 'll range_sum(ll, ll)':
Main.cpp:97:21: warning: unused variable 'cnt' [-Wunused-variable]
97 | ll dif = a - 1, cnt = b - a + 1;
| ^~~
Main.cpp: In function 'll bin_to_dec(std::string)':
Main.cpp:120:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
120 | for (int i = 0; i < s.size(); i++) {
| ~~^~~~~~~~~~
Main.cpp: In function 'void slv()':
Main.cpp:236:13: warning: unused variable 'x' [-Wunused-variable]
236 | int x = 1;
| ^
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
User solution is worse than jury's solution |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
0 ms |
348 KB |
Correct |
| 2 |
Incorrect |
5 ms |
604 KB |
User solution is worse than jury's solution |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
User solution is worse than jury's solution |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
User solution is worse than jury's solution |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
User solution is worse than jury's solution |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Incorrect |
0 ms |
348 KB |
User solution is worse than jury's solution |
| 2 |
Halted |
0 ms |
0 KB |
- |
