oj.uz

Submission #1047263

# Submission time Handle Problem Language Result Execution time Memory
1047263 2024-08-07T11:29:30 Z Mher777 Sprinklers (CEOI24_sprinklers) C++17
3 / 100
 53 ms 2684 KB 
#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) {
        cout << -1;
        return;
    }
    cout << ans << '\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++) {
      |                     ~~^~~~~~~~~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 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 7 ms 604 KB Correct
3 Correct 0 ms 348 KB Correct
4 Correct 6 ms 756 KB Correct
5 Correct 6 ms 788 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 2 ms 348 KB Correct
9 Correct 0 ms 348 KB Correct

Subtask #2
0.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Correct
2 Correct 9 ms 800 KB Correct
3 Correct 4 ms 604 KB Correct
4 Correct 33 ms 2660 KB Correct
5 Correct 33 ms 2660 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 25 ms 2664 KB Correct
9 Correct 24 ms 2684 KB Correct
10 Correct 33 ms 2660 KB Correct
11 Correct 23 ms 2140 KB Correct
12 Correct 18 ms 1372 KB Correct
13 Correct 27 ms 2536 KB Correct
14 Incorrect 28 ms 2532 KB User solution is incorrect
15 Halted 0 ms 0 KB -

Subtask #3
0.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Correct
2 Correct 0 ms 348 KB Correct
3 Correct 0 ms 348 KB Correct
4 Incorrect 0 ms 348 KB User solution is incorrect
5 Halted 0 ms 0 KB -

Subtask #4
0.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Correct
2 Correct 12 ms 856 KB Correct
3 Correct 45 ms 2664 KB Correct
4 Correct 48 ms 2648 KB Correct
5 Correct 49 ms 2648 KB Correct
6 Correct 48 ms 2604 KB Correct
7 Correct 45 ms 2640 KB Correct
8 Correct 47 ms 2664 KB Correct
9 Correct 45 ms 2664 KB Correct
10 Correct 53 ms 2660 KB Correct
11 Correct 46 ms 2644 KB Correct
12 Incorrect 1 ms 348 KB User solution is incorrect
13 Halted 0 ms 0 KB -

Subtask #5
0.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Correct
2 Correct 0 ms 348 KB Correct
3 Correct 7 ms 604 KB Correct
4 Correct 0 ms 348 KB Correct
5 Correct 6 ms 756 KB Correct
6 Correct 6 ms 788 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 0 ms 348 KB Correct
9 Correct 2 ms 348 KB Correct
10 Correct 0 ms 348 KB Correct
11 Correct 9 ms 800 KB Correct
12 Correct 4 ms 604 KB Correct
13 Correct 33 ms 2660 KB Correct
14 Correct 33 ms 2660 KB Correct
15 Correct 0 ms 348 KB Correct
16 Correct 0 ms 348 KB Correct
17 Correct 25 ms 2664 KB Correct
18 Correct 24 ms 2684 KB Correct
19 Correct 33 ms 2660 KB Correct
20 Correct 23 ms 2140 KB Correct
21 Correct 18 ms 1372 KB Correct
22 Correct 27 ms 2536 KB Correct
23 Incorrect 28 ms 2532 KB User solution is incorrect
24 Halted 0 ms 0 KB -