Submission #206988

#	Time	Username	Problem	Language	Result	Execution time	Memory
206988		joylintp	Miners (IOI07_miners)	C++17	16 / 100	25 ms	632 KiB

miners

#include<bits/stdc++.h>
using namespace std;

int cc(string s)
{
    set<char> ss;
    for (char c : s)
        ss.insert(c);
    return (int)ss.size();
}

signed main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(0);

    int n;
    string s;
    cin >> n >> s;

    int ans = 0;
    string a, b;
    for (int i = 0; i < n; )
    {
        int r = i;
        while (r < n && s[i] == s[r])
            r++;

        for (int j = i; j < r; j++)
            if ((j - i) & 1)
            {
                a += s[j];
                if (a.size() > 3)
                    a = a.substr(1);
                ans += cc(a);
            }
            else
            {
                b += s[j];
                if (b.size() > 3)
                    b = b.substr(1);
                ans += cc(b);
            }
        i = r;
    }
    cout << ans << '\n';

    return 0;
}

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