Submission #300004

#	Time	Username	Problem	Language	Result	Execution time	Memory
300004		ryuku1110	Grudanje (COCI19_grudanje)	C++14	70 / 70	308 ms	13940 KiB

grudanje

#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
using namespace std;
typedef long long ll;
string a;
int q, n, d[100001], suffix_arr[26][100001];
pair <int, int> query[100001];

bool ok(int x) {
    string z = a;
    for (int i = 1; i <= x; ++ i) {
        z[d[i]] = '*';
    }
    // cout << z << endl;
    for (int i = 0; i <= 25; ++ i)
        suffix_arr[i][0] = 0;
    
    for (int i = 1; i <= n; ++ i) {
        
        for (int j = 0; j <= 25; ++ j) 
            suffix_arr[j][i] = 0;

        if (z[i] != '*') {
            suffix_arr[int(z[i] - 'a')][i] = 1;
        }
        
        for (int j = 0; j <= 25; ++ j) {
            suffix_arr[j][i] += suffix_arr[j][i-1];
        }
    }

    for (int i = 1; i <= q; ++ i) {
        for (int j = 0; j <= 25; ++ j) {
            if (suffix_arr[j][query[i].se] - suffix_arr[j][query[i].fi - 1] > 1) return false;
        }
    }
    return true;
}

int main() {
    //freopen(".INP", "r", stdin);
    //freopen(".OUT", "w", stdout);
    ios_base::sync_with_stdio(false);
    cin.tie(NULL); cout.tie(NULL);
    cin >> a;
    n = a.size();
    a = '0' + a;

    cin >> q;
    for (int i = 1; i <= q; ++ i) {
        cin >> query[i].fi >> query[i].se;
    }

    for (int i = 1; i <= n; ++ i) {
        cin >> d[i];
    }

    int l = 0, r = n, ans;
    while (l <= r) {
        int mid = (l + r) / 2;
        if (ok(mid)) {
            r = mid - 1;
            ans = mid;
        }
        else l = mid + 1;
    }
    cout << ans;
    return 0;
}

Compilation message (stderr)

grudanje.cpp: In function 'int main()':
grudanje.cpp:69:13: warning: 'ans' may be used uninitialized in this function [-Wmaybe-uninitialized]
   69 |     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