#include <bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define conts continue
#define ff first
#define ss second
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define sz(a) (int)a.size()
#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)
template<typename T>
void amin(T &x, T y){
x = min(x,y);
}
template<typename T>
void amax(T &x, T y){
x = max(x,y);
}
template<typename A,typename B>
string to_string(pair<A,B> p);
string to_string(const string &s){
return "'"+s+"'";
}
string to_string(const char *s){
return to_string((string)s);
}
string to_string(bool b){
return b?"true":"false";
}
template<typename A>
string to_string(A v){
string res = "{";
trav(x,v){
res += to_string(x)+",";
}
if(res.back() == ',') res.pop_back();
res += "}";
return res;
}
template<typename A,typename B>
string to_string(pair<A,B> p){
return "("+to_string(p.ff)+","+to_string(p.ss)+")";
}
#define debug(x) cout << #x << " = "; cout << to_string(x) << endl
const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = 1e9 + 5;
const ll inf2 = (ll)1e18 + 5;
void solve(int test_case){
ll n,m; cin >> n >> m;
vector<ll> a(n+5), b(m+5);
rep1(i,n) cin >> a[i];
rep1(i,m) cin >> b[i];
// sort(a.begin()+1,a.begin()+n+1);
// sort(b.begin()+1,b.begin()+m+1);
rep1(i,m){
if(binary_search(a.begin()+1,a.begin()+n+1,b[i])){
b[i] = -1;
}
}
vector<array<ll,3>> c;
rep1(i,n) c.pb({a[i],i,1});
rep1(i,m){
if(b[i] != -1){
c.pb({b[i],i,2});
}
}
sort(all(c));
ll siz = sz(c);
vector<char> ans(n+5,'?');
auto ok = [&](ll mid, bool construct){
ll dp[siz+5][m+5];
pii par[siz+5][m+5];
memset(dp,-0x3f,sizeof dp);
memset(par,-1,sizeof par);
dp[0][0] = 0;
rep(i,siz){
auto [x,ind,t] = c[i];
if(t == 1){
pll mx = {-inf2,-1};
rep1(j,m){
if(b[j] > x) break;
if(dp[i][j] < 0) conts;
if(b[j] >= x-mid){
pll px = {dp[i][j],j};
amax(mx,px);
}
dp[i+1][j] = x+mid;
par[i+1][j] = {j,2};
}
// turn right
if(dp[i][0] >= 0){
dp[i+1][0] = x+mid;
par[i+1][0] = {0,2};
}
// turn left
if(mx.ff > dp[i+1][0]){
dp[i+1][0] = mx.ff;
par[i+1][0] = {mx.ss,1};
}
}
else{
rep1(j,m){
dp[i+1][j] = dp[i][j];
par[i+1][j] = {j,0};
}
if(dp[i][0] >= x){
dp[i+1][0] = dp[i][0];
par[i+1][0] = {0,0};
}
else{
dp[i+1][ind] = dp[i][0];
par[i+1][ind] = {0,0};
}
}
}
if(construct){
ll j = 0;
rev(i,siz,0){
auto [j2,put] = par[i][j];
if(put == 1){
ans[c[i-1][1]] = 'L';
}
else if(put == 2){
ans[c[i-1][1]] = 'R';
}
j = j2;
}
}
return dp[siz][0] >= 0;
};
ll lo = 0, hi = inf1;
ll best = -1;
while(lo <= hi){
ll mid = (lo+hi) >> 1;
if(ok(mid,0)){
best = mid;
hi = mid-1;
}
else{
lo = mid+1;
}
}
cout << best << endl;
if(best == -1) return;
ok(best,1);
rep1(i,n) cout << ans[i];
cout << endl;
rep1(i,m){
if(b[i] == -1) conts;
ll x = b[i];
bool good = false;
rep1(j,n){
ll l = -1, r = -1;
if(ans[j] == 'R'){
l = a[j], r = a[j]+best;
}
else{
l = a[j]-best, r = a[j];
}
if(l <= x and x <= r){
good = true;
break;
}
}
if(!good){
assert(0);
}
}
}
int main(){
int t = 1;
// cin >> t;
rep1(i,t){
solve(i);
}
return 0;
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Correct |
2 |
Correct |
0 ms |
348 KB |
Correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Correct |
2 |
Runtime error |
504 ms |
1048576 KB |
Execution killed with signal 9 |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Correct |
2 |
Runtime error |
545 ms |
1048576 KB |
Execution killed with signal 9 |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Correct |
2 |
Correct |
0 ms |
348 KB |
Correct |
3 |
Correct |
23 ms |
4444 KB |
Correct |
4 |
Correct |
9 ms |
2680 KB |
Correct |
5 |
Correct |
82 ms |
16216 KB |
Correct |
6 |
Correct |
66 ms |
16220 KB |
Correct |
7 |
Correct |
1 ms |
348 KB |
Correct |
8 |
Correct |
77 ms |
16360 KB |
Correct |
9 |
Correct |
65 ms |
16216 KB |
Correct |
10 |
Runtime error |
76 ms |
32840 KB |
Execution killed with signal 6 |
11 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Correct |
2 |
Runtime error |
568 ms |
1048576 KB |
Execution killed with signal 9 |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
348 KB |
Correct |
2 |
Correct |
0 ms |
348 KB |
Correct |
3 |
Runtime error |
504 ms |
1048576 KB |
Execution killed with signal 9 |
4 |
Halted |
0 ms |
0 KB |
- |