Submission #565606

#	Time	Username	Problem	Language	Result	Execution time	Memory
565606		AbdullahMW	Election (BOI18_election)	C++17	28 / 100	3052 ms	2064 KiB

election

#include <bits/stdc++.h>
 
#define all(vec) vec.begin(), vec.end()
#define ll long long
#define db double
#define pb push_back
#define pf push_front
#define newl "\n"
#define fast ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define f first
#define s second
#define MOD 1000000007
 
using namespace std;
 
 
int main()
{
    fast
    //setIO("");
    
    //freopen("filename.in", "r", stdin);
    //freopen("filename.out", "w", stdout);
  
    ll n; cin >> n;
    string s; cin >> s;
    
    ll q; cin >> q;
    while (q--)
    {
        unordered_map <ll, bool> nul;
        ll l, r; cin >> l >> r;
        l--, r--;
        
        ll c = 0, t = 0, cnt = 0;
        for (ll i = l; i <= r; i++)
        {
            if (s[i] == 'C') c++;
            else 
            {
                t++;
                if (t > c) 
                {
                    nul[i] = true;
                    t--;
                    cnt++;
                }
            }
            
            
        }
        
        c = 0, t = 0;
        for (ll i = r; i >= l; i--)
        {
            if (s[i] == 'C') c++;
            else 
            {
                t++;
                if (t > c) 
                {
                    t--;
                    if (!nul[i]) cnt++;
                }
                else if (nul[i]) t--;
            }
        }
        
        cout << cnt << newl;
    }
}
    

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