Submission #565655

#	Time	Username	Problem	Language	Result	Execution time	Memory
565655		RealSnake	Election (BOI18_election)	C++14	28 / 100	3082 ms	944 KiB

election

#include "bits/stdc++.h"
using namespace std;

#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
typedef tree<int, null_type, less<int>, rb_tree_tag, tree_order_statistics_node_update> ordered_set;

#define ll long long
#define mod 1000000007

ofstream fout(".out");
ifstream fin(".in");

signed main() {

    ios::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);

    int n, q;
    string st;
    cin >> n >> st >> q;
    int b[n] = {};
    while(q--) {
        int l, r;
        cin >> l >> r;
        l--;
        r--;
        int c = 0, ans = 0;
        for(int i = l; i <= r; i++) {
            if(st[i] == 'C')
                c++;
            else {
                if(!c) {
                    b[i] = 1;
                    ans++;
                }
                else
                    c--;
            }
        }
        c = 0;
        for(int i = r; i >= l; i--) {
            if(b[i]) {
                b[i] = 0;
                continue;
            }
            if(st[i] == 'C')
                c++;
            else {
                if(!c)
                    ans++;
                else
                    c--;
            }
        }
        cout << ans << "\n";
    }

    return 0;
}

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