Submission #111102

#	Time	Username	Problem	Language	Result	Execution time	Memory
111102		losmi247	Election (BOI18_election)	C++14	28 / 100	3030 ms	2284 KiB

election

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
const int N = 5e5+23;

int a[N],n;
bool ode[N];
string s;

int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    int q;
    cin >> n;
    cin >> s;
    for(int i = 1; i <= n; i++){
        a[i] = (s[i-1] == 'C' ? 1 : -1);
    }
    cin >> q;
    while(q--){
        int l,r;
        cin >> l >> r;
        int sol = 0,bal = 0;
        for(int i = l; i <= r; i++){
            ode[i] = 0;
        }
        for(int i = l; i <= r; i++){
            bal += a[i];
            if(bal < 0){
                ode[i] = 1;
                sol++;
                bal++;
            }
        }
        bal = 0;
        for(int i = r; i >= l; i--){
            if(ode[i]){
                continue;
            }
            bal += a[i];
            if(bal < 0){
                sol++;
                bal++;
            }
        }
        cout << sol << endl;
    }
}

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