Submission #1112075

#	Time	Username	Problem	Language	Result	Execution time	Memory
1112075		huantran	Grudanje (COCI19_grudanje)	C++17	70 / 70	108 ms	16204 KiB

grudanje

#include <bits/stdc++.h>
 
using namespace std;
using ll = long long int;
const int maxn = 2e5 + 5;
const int oo = 1e9 + 7;
const ll inf = 1e18;

int n, q;
string s;
int pre[maxn][27], del[maxn];

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0), cout.tie(0);
    
    cin >> s;
    int n = (int)s.length();
    s = ' ' + s;

    cin >> q;
    vector<pair<int, int>> a(q);
    for (int i = 0; i < q; i++)
        cin >> a[i].first >> a[i].second;
    
    for (int i = 1; i <= n; i++)
        cin >> del[i];

    int l = 0, r = n; 
    int ans = n;
    while (l <= r) {
        int mid = (l + r) >> 1;
        vector<int> cnt(n + 1, 0);
        for (int i = 1; i <= mid; i++) {
            cnt[del[i]]++;
        }

        for (int i = 1; i <= n; i++) {
            for (int j = 0; j < 26; j++) {
                if ((s[i] - 'a') == j && !cnt[i])
                    pre[i][j] = pre[i - 1][j] + 1;
                else    
                    pre[i][j] = pre[i - 1][j];
            }
        }    

        int ck = 0;
        for (int i = 0; i < q; i++) {
            int ll = a[i].first;
            int rr = a[i].second;
            for (int j = 0; j < 26; j++) {
                if (pre[rr][j] - pre[ll - 1][j] > 1) {
                    ck = 1;
                    break;
                }
            }
            if (ck == 1)
                break;
        }

        if (ck == 0) {
            ans = mid;
            r = mid - 1;
        }
        else 
            l = mid + 1;
    }

    cout << ans;
}

• Subtask 1: 7 / 7
• Subtask 2: 7 / 7
• Subtask 3: 7 / 7
• Subtask 4: 7 / 7
• Subtask 5: 7 / 7
• Subtask 6: 7 / 7
• Subtask 7: 7 / 7
• Subtask 8: 7 / 7
• Subtask 9: 7 / 7
• Subtask 10: 7 / 7