oj.uz

Submission #1047187

# Submission time Handle Problem Language Result Execution time Memory
1047187 2024-08-07T10:11:27 Z dilanyan Sprinklers (CEOI24_sprinklers) C++17
3 / 100
 10 ms 1112 KB 
//-------------dilanyan------------\\ 
 
#define _CRT_SECURE_NO_WARNINGS
#include<bits/stdc++.h>
#include<stdio.h>
using namespace std;
 
//------------------Kargpefines--------------------\\ 
 
#define ll long long
#define pb push_back
#define all(u) (u).begin(), (u).end()
#define pqueue priority_queue
#define upper upper_bound
#define lower lower_bound
#define umap unordered_map
#define uset unordered_set
 
void KarginSet(string name = "") {
    ios_base::sync_with_stdio(false); cin.tie(NULL);
    if (name.size()) {
        freopen((name + ".in").c_str(), "r", stdin);
        freopen((name + ".out").c_str(), "w", stdout);
    }
}
 
//-------------------KarginConstants------------------\\ 
 
const ll mod = 1e9 + 7;
const ll inf = 2e9;
 
//-------------------KarginCode-----------------------\\ 
 
const int N = 100005, M = 1000005;

int n, m;

int s[N], f[N];
int dp[N], d[N];

void KarginSolve() {
    int n, m;
    cin >> n >> m;
    for (int i = 1;i <= n;i++) cin >> s[i];
    for (int i = 1;i <= m;i++) cin >> f[i];
    ll l = 0, r = 1e9, ans = -1;
    vector<pair<int, char>> from(n + 1), bfrom(n + 1);
    while (l <= r) {
        ll mid = (l + r) / 2;
        for (int i = 0; i <= n;i++) dp[i] = 0, bfrom[i] = { 0,'?' }; // lx[i] = 0, rx[i] = 0;
        for (int i = 0;i < n;i++) {
            if (f[dp[i] + 1] < s[i + 1]) {
                if (f[dp[i] + 1] >= s[i + 1] - mid) {
                    int j = upper(f + 1 + dp[i], f + m + 1, s[i + 1]) - f - 1;
                    if (dp[i + 1] < j) {
                        dp[i + 1] = j;
                        bfrom[i + 1] = { i,'L' };
                    }
                }
            }
            else {
                int j = upper(f + 1 + dp[i], f + 1 + m, s[i + 1] + mid) - f - 1;
                if (dp[i + 1] < j) {
                    dp[i + 1] = j;
                    bfrom[i + 1] = { i,'R' };
                }
            }
            if (i + 2 <= n && f[dp[i] + 1] >= s[i + 2] - mid) {
                int j = upper(f + 1 + dp[i], f + m + 1, s[i + 2]) - f - 1;
                int jj = upper(f + 1 + dp[i], f + m + 1, s[i + 1] + mid) - f - 1;
                if (dp[i + 2] < max(j,jj)) {
                    dp[i + 2] = max(j, jj);
                    bfrom[i + 2] = { i,'?' };
                }
            }
        }
        if (dp[n] == m) {
            r = mid - 1;
            ans = mid;
            swap(from, bfrom);
        }
        else {
            l = mid + 1;
        }
    }
    cout << ans << '\n';
    if (ans == -1) return;
    int x = n;
    vector<char> answ(n + 1);
    while (x != 0) {
        if (from[x].first == x - 2) {
            answ[x] = 'L', answ[x - 1] = 'R';
            x -= 2;
        }
        else {
            answ[x] = from[x].second;
            x--;
        }
    }
    for (int i = 1;i <= n;i++) cout << answ[i];
}

int main() {
    KarginSet();
    int test = 1;
    //cin >> test;
    while (test--) {
        KarginSolve();
    }
    return 0; 
};

Compilation message

Main.cpp:1:1: warning: multi-line comment [-Wcomment]
    1 | //-------------dilanyan------------\\
      | ^
Main.cpp:8:1: warning: multi-line comment [-Wcomment]
    8 | //------------------Kargpefines--------------------\\
      | ^
Main.cpp:27:1: warning: multi-line comment [-Wcomment]
   27 | //-------------------KarginConstants------------------\\
      | ^
Main.cpp:32:1: warning: multi-line comment [-Wcomment]
   32 | //-------------------KarginCode-----------------------\\
      | ^
Main.cpp: In function 'void KarginSet(std::string)':
Main.cpp:22:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |         freopen((name + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:23:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         freopen((name + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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 5 ms 600 KB Correct
3 Correct 1 ms 348 KB Correct
4 Correct 5 ms 860 KB Correct
5 Correct 6 ms 860 KB Correct
6 Correct 0 ms 348 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 1 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 1 ms 348 KB Correct
2 Incorrect 7 ms 856 KB Invalid character in the string
3 Halted 0 ms 0 KB -

Subtask #3
0.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Correct
2 Correct 0 ms 348 KB Correct
3 Incorrect 0 ms 344 KB User solution is worse than jury's solution
4 Halted 0 ms 0 KB -

Subtask #4
0.0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Correct
2 Incorrect 10 ms 1112 KB User solution is worse than jury's solution
3 Halted 0 ms 0 KB -

Subtask #5
0.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Correct
2 Correct 0 ms 348 KB Correct
3 Correct 5 ms 600 KB Correct
4 Correct 1 ms 348 KB Correct
5 Correct 5 ms 860 KB Correct
6 Correct 6 ms 860 KB Correct
7 Correct 0 ms 348 KB Correct
8 Correct 0 ms 348 KB Correct
9 Correct 1 ms 348 KB Correct
10 Correct 0 ms 348 KB Correct
11 Incorrect 7 ms 856 KB Invalid character in the string
12 Halted 0 ms 0 KB -