Submission #994109

#	Time	Username	Problem	Language	Result	Execution time	Memory
994109		vjudge1	Rima (COCI17_rima)	C++17	28 / 140	241 ms	148672 KiB

rima

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

const int N = 5e5 + 10;
int n, sz;
string S[N];
int dp[N * 10];
bool have[N * 10];
vector<pair<char, int>> g[N * 10];

void add(string s){
    int cur = 0;
    for (int i = 0; i < s.size(); i ++){
        int nxt = 0;
        for (auto [c, v] : g[cur]){
            if (c == s[i]){
                nxt = v;
                break;
            }
        }

        if (nxt){
            cur = nxt;
        }
        else{
            for (int j = i; j < s.size(); j ++){
                sz++;
                g[cur].push_back({s[j], sz});
                cur = sz;
            }
            break;
        }
    }

    have[cur] = 1;
}

void print(){
    for (int i = 0; i <= sz; i ++){
        cout << "current node = " << i << endl;
        for (auto [c, v] : g[i]){
            cout << "child " << v << " with char " << c << endl; 
        }
    }
}

int main(){
    cin >> n;
    for (int i = 0; i < n; i ++){
        cin >> S[i];
        reverse(S[i].begin(), S[i].end());
        add(S[i]);
    }

    int ans = 0;
    // print();
    // cout << endl;
    for (int i = sz; i >= 0; i --){
        // cout << "current node = " << i << endl;

        int mx1 = 0;
        int mx2 = 0;
        for (auto [c, v] : g[i]){
            // cout << "going to " << v << " with char " << c << endl;
            if (have[v]){
                if (mx2 < dp[v])
                    mx2 = dp[v];
                if (mx1 < mx2)
                    swap(mx1, mx2);
            }
        }
        dp[i] = mx1 + mx2 + have[i];
        ans = max(ans, dp[i]);
        // cout << "Answer = " << dp[i] << endl;
    }

    cout << ans << endl;
}

Compilation message (stderr)

rima.cpp: In function 'void add(std::string)':
rima.cpp:13:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     for (int i = 0; i < s.size(); i ++){
      |                     ~~^~~~~~~~~~
rima.cpp:26:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |             for (int j = i; j < s.size(); j ++){
      |                             ~~^~~~~~~~~~

• Subtask 1: 28 / 140