Submission #991887

#	Time	Username	Problem	Language	Result	Execution time	Memory
991887		LOLOLO	Rima (COCI17_rima)	C++17	70 / 140	166 ms	69812 KiB

rima

#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
 
#define           f     first
#define           s     second
#define           pb    push_back
#define           ep    emplace
#define           eb    emplace_back
#define           lb    lower_bound
#define           ub    upper_bound
#define       all(x)    x.begin(), x.end()
#define      rall(x)    x.rbegin(), x.rend()
#define   uniquev(v)    sort(all(v)), (v).resize(unique(all(v)) - (v).begin())
#define     mem(f,x)    memset(f , x , sizeof(f))
#define        sz(x)    (ll)(x).size()
#define  __lcm(a, b)    (1ll * ((a) / __gcd((a), (b))) * (b))
#define          mxx    *max_element
#define          mnn    *min_element
#define    cntbit(x)    __builtin_popcountll(x)
#define       len(x)    (int)(x.length())

int cc = 1, root = 0;
int nxt[3000006][26], tail[3000006];
string s;

void add(int &p, int i) {
    if (p == 0) {
        p = cc;
        cc++;
    }

    if (i == len(s)) {
        tail[p] = 1;
        return;
    }

    add(nxt[p][s[i] - 'a'], i + 1);
}

int ans = 0;

int dfs(int p) {
    int m1 = 0, m2 = 0, cnt = 0;
    for (int i = 0; i < 26; i++) {
        if (nxt[p][i]) {
            int val = dfs(nxt[p][i]);
            if (tail[nxt[p][i]] == 0)
                continue;
            
            cnt += 1;
            if (m1 < val) {
                m2 = m1;
                m1 = val;
            } else {
                m2 = max(m2, val);
            }
        }
    }

    ans = max(ans, m1 + m2 + cnt);
    return m1 + cnt;
}
 
int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int n;
    cin >> n;

    for (int i = 1; i <= n; i++) {
        cin >> s;
        reverse(all(s));
        add(root, 0);
    }

    dfs(root);
    cout << ans << '\n';
    return 0;
}

• Subtask 1: 70 / 140