Submission #692905

#	Time	Username	Problem	Language	Result	Execution time	Memory
692905		zeroesandones	Miners (IOI07_miners)	C++17	45 / 100	1582 ms	832 KiB

miners

// https://oj.uz/problem/view/IOI07_miners
#include "bits/stdc++.h"
using namespace std;

typedef long long ll;
typedef long double ld;
typedef vector<ll> vi;
typedef pair<ll, ll> pi;

#define FOR(i, j, k) for (ll i = j; i < (ll) k; ++i)
#define FORD(i, j, k) for (ll i = j; i >= (ll) k; --i)
#define nl "\n"
#define sp " "

#define all(x) (x).begin(), (x).end()
#define sc second
#define fr first
#define pb emplace_back

void solve()
{
    ll n;
    cin >> n;

    string s;
    cin >> s;

    ll ans = 0;
    FOR(i, 0, (1<<n)) {
        vector<char> m1, m2;
        FOR(j, 0, n) {
            if(i & (1<<j)) {
                m1.pb(s[j]);
            } else {
                m2.pb(s[j]);
            }
        }

        ll curr = 0;
        for(int j = 0; j < (int) m1.size(); ++j) {
            set<char> diff;
            diff.insert(m1[j]);
            if(j - 1 >= 0)
                diff.insert(m1[j - 1]);
            if(j - 2 >= 0)
                diff.insert(m1[j - 2]);
            curr += diff.size();
        }

        for(int j = 0; j < (int) m2.size(); ++j) {
            set<char> diff;
            diff.insert(m2[j]);
            if(j - 1 >= 0)
                diff.insert(m2[j - 1]);
            if(j - 2 >= 0)
                diff.insert(m2[j - 2]);
            curr += diff.size();
        }

        ans = max(ans, curr);
    }

    cout << ans << nl;
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    ll t = 1;
    // cin >> t;
    while (t--)
    {
        solve();
    }
}

• Subtask 1: 9 / 9
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 0 / 7
• Subtask 7: 0 / 8
• Subtask 8: 0 / 8
• Subtask 9: 0 / 8
• Subtask 10: 0 / 8
• Subtask 11: 0 / 8
• Subtask 12: 0 / 8