Submission #565570

#	Time	Username	Problem	Language	Result	Execution time	Memory
565570		birthdaycake	Election (BOI18_election)	C++17	28 / 100	3061 ms	1336 KiB

election

#include<bits/stdc++.h>
#define int long long
#define endl '\n'
#define mod 1000000007
#define boost ios_base::sync_with_stdio(false), cin.tie(NULL);
using namespace std;
 
 
 

 
int y[200001];
signed main(){
    boost;
    
    int n; cin >> n;
    string a; cin >> a;
    int q; cin >> q;
    while(q--){
        int l,r, cur = 0, ans = 0; cin >> l >> r;
        l--; r--;
        for(int i = l; i <= r; i++){
            y[i] = 0;
            
            if(a[i] == 'T') cur--;
            else cur++;
            
            if(cur < 0){
                y[i]++;
                cur++;
                ans++;
            }
        }
        cur = 0;
        for(int i = r; i >= l; i--){
            if(y[i]) continue;
            if(a[i] == 'T') cur--;
            else cur++;
            if(cur < 0){
                ans++;
                cur++;
            }
        }
        cout << ans << endl;
    }
    
    return 0;
}

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