제출 #244844

#제출 시각아이디문제언어결과실행 시간메모리
244844VEGAnnRima (COCI17_rima)C++14
14 / 140
1090 ms19284 KiB
#include <bits/stdc++.h>
#define all(x) x.begin(),x.end()
#define sz(x) ((int)x.size())
using namespace std;
const int N = 500100;
string s[N];
int n, ans = 0, f[N];

bool ok(int i, int j){
    int ned = max(sz(s[i]), sz(s[j])) - 1;

    int lf = 0;

    while (lf < min(sz(s[i]), sz(s[j])) && s[i][lf] == s[j][lf])
        lf++;

    return bool(lf >= ned);
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);

#ifdef _LOCAL
    freopen("in.txt","r",stdin);
#endif // _LOCAL

    cin >> n;

    for (int i = 0; i < n; i++){
        cin >> s[i];

        reverse(all(s[i]));
    }

    sort(s, s + n);

    for (int i = 0; i < n; i++){
        f[i] = max(f[i], 1);
        ans = max(ans, f[i]);

        for (int j = i + 1; j < n; j++)
            if (ok(i, j))
                f[j] = max(f[j], f[i] + 1);
    }

    cout << ans;

    return 0;
}
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