Submission #806991

#	Time	Username	Problem	Language	Result	Execution time	Memory
806991		MODDI	Election (BOI18_election)	C++14	28 / 100	3048 ms	1148 KiB

election

#include <bits/stdc++.h>
using namespace std;
#define mp make_pair
#define pb push_back
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ll> vl;
const int maxn = 500005;
int n;
string s;
int main()
{
    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