oj.uz

Submission #907101

# Submission time Handle Problem Language Result Execution time Memory
907101 2024-01-15T06:59:39 Z typ_ik Watching (JOI13_watching) C++17
50 / 100
 16 ms 22108 KB 
#include <bits/stdc++.h>

#define ll long long
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
#define watch(x) cout << (#x) << " : " << x << '\n'
#define boost ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)

using namespace std;  

const int N = 222;
bool dp[N][N][N];
int a[N];

void solve() { 
    int n, p, q;
    cin >> n >> p >> q;
    for (int i = 1; i <= n; i++)
        cin >> a[i];

    sort(a + 1, a + n + 1);
    
    if (p + q >= n) {
        cout << 1 << '\n';
        return;
    } 

    auto check = [&](int w) -> bool {  
        memset(dp, 0, sizeof(dp));
        for (int i = 0; i <= p; i++)
            for (int j = 0; j <= q; j++)
                dp[0][i][j] = 1;
        int j0 = 0, j1 = 0; 

        for (int i = 1; i <= n; i++) {
            // place w.
            while (j0 + 1 <= n && a[j0 + 1] - a[i] + 1 <= w)
                j0++;
            while (j1 + 1 <= n && a[j1 + 1] - a[i] + 1 <= 2*w)
                j1++;  

            for (int lp = 0; lp <= p; lp++)
                for (int lq = 0; lq <= q; lq++)
                    dp[j0][lp][lq] |= dp[i-1][lp + 1][lq];
             
            for (int lp = 0; lp <= p; lp++)
                for (int lq = 0; lq <= q; lq++)
                    dp[j1][lp][lq] |= dp[i-1][lp][lq + 1];
        }  

        return dp[n][0][0];
    };   

    int l = 0, r = 1e9 + 128;
    while (l + 1 < r) {
        int m = (l + r) >> 1;
        if (check(m))
            r = m;
        else 
            l = m;
    }

    cout << r << '\n';
}

main() { 
    boost;  
    solve();
    return 0;
}

Compilation message

watching.cpp:66:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   66 | main() {
      | ^~~~

Subtask #1
50.0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 11100 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 7 ms 11096 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 9 ms 11100 KB Output is correct
8 Correct 8 ms 11096 KB Output is correct
9 Correct 8 ms 11100 KB Output is correct
10 Correct 10 ms 11100 KB Output is correct
11 Correct 13 ms 11164 KB Output is correct
12 Correct 16 ms 10964 KB Output is correct
13 Correct 7 ms 11100 KB Output is correct
14 Correct 9 ms 11100 KB Output is correct
15 Correct 8 ms 11100 KB Output is correct

Subtask #2
0 / 50.0

# Verdict Execution time Memory Grader output
1 Runtime error 13 ms 22108 KB Execution killed with signal 11
2 Halted 0 ms 0 KB -