Submission #802306

#	Time	Username	Problem	Language	Result	Execution time	Memory
802306		borisAngelov	Election (BOI18_election)	C++17	28 / 100	3059 ms	1012 KiB

election

#include <bits/stdc++.h>

using namespace std;

const int maxn = 500005;

int n;
string s;

void fastIO()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
}

int main()
{
    fastIO();

    cin >> n >> s;
    s = '#' + s;

    int q;
    cin >> q;

    while (q--)
    {
        int l, r;
        cin >> l >> r;

        vector<bool> gone(n + 5, false);

        int c = 0;
        int t = 0;

        for (int i = l; i <= r; ++i)
        {
            if (s[i] == 'C')
            {
                c++;
            }
            else
            {
                if (t + 1 <= c)
                {
                    ++t;
                }
                else
                {
                    gone[i] = true;
                }
            }
        }

        c = 0;
        t = 0;

        for (int i = r; i >= l; --i)
        {
            if (s[i] == 'C')
            {
                ++c;
            }
            else if (gone[i] == false)
            {
                if (t + 1 <= c)
                {
                    ++t;
                }
                else
                {
                    gone[i] = true;
                }
            }
        }

        int ans = 0;

        for (int i = l; i <= r; ++i)
        {
            ans += gone[i];
        }

        cout << ans << '\n';
    }

    return 0;
}

• Subtask 1: 28 / 28
• Subtask 2: 0 / 54
• Subtask 3: 0 / 18