Submission #1252772

#	Time	Username	Problem	Language	Result	Execution time	Memory
1252772		CodeLakVN	Rima (COCI17_rima)	C++20	140 / 140	181 ms	115276 KiB

rima

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

#define task "main"
#define F first
#define S second
#define ii pair<int, int>
#define il pair<int, long long>
#define li pair<long long, int>
#define FOR(i, a, b) for(int i = (a); i <= (b); ++i)
#define FOD(i, b, a) for(int i = (b); i >= (a); --i)

template <class T1, class T2>
    bool maximize(T1 &a, T2 b){
        if (a < b) {a = b; return true;}
        return false;
    }

template <class T1, class T2>
    bool minimize(T1 &a, T2 b){
        if (a > b) {a = b; return true;}
        return false;
    }

template <class T>
    void printArr(T container, string separator = " ", string finish = "\n", ostream &out = cout){
        for(auto item: container) out << item << separator;
        out << finish;
    }

const int MAX_N = (int)5e5 + 5;
const int MAX_LEN = (int)3e6 + 6;

int nWord;
string word;

struct NODE {
    int child[26];
    int dp = 0;
    bool isEnd = 0;
};
vector<NODE> trie;
NODE newNode;

int nNode = 0;

void addWord(string &s) {
    int id = 0;
    for (char ch : s) {
        int c = ch - 'a';
        if (!trie[id].child[c]) {
            trie[id].child[c] = ++nNode;
            trie.push_back(newNode);
        }
        id = trie[id].child[c];
    }
    trie[id].isEnd = 1;
}

void updateMax(ii &a, int x) {
    if (a.F < x) a.S = a.F, a.F = x;
    else if (a.S < x) a.S = x;
}

int ans = 0;

void calc(int u) {
    int cntChild = 0;
    ii maxChilds = {0, 0};
    FOR(c, 0, 25) {
        int childID = trie[u].child[c];
        if (!childID) continue;
        calc(childID);
        cntChild += trie[childID].isEnd;
        updateMax(maxChilds, trie[childID].dp);
        maximize(trie[u].dp, trie[childID].dp);
    }
    if (trie[u].isEnd) trie[u].dp += 1 + max(0, cntChild - 1);
    else trie[u].dp = 0;

    maximize(ans, maxChilds.F + maxChilds.S + trie[u].isEnd + max(0, cntChild - 2));
}

void solve() {
    trie.push_back(newNode);
    cin >> nWord;
    FOR(i, 1, nWord) {
        cin >> word;
        reverse(word.begin(), word.end());
        addWord(word);
    }

    calc(0);
    cout << ans;
}

int32_t main() {
    if (fopen(task".inp", "r")) {
        freopen(task".inp", "r", stdin);
        freopen(task".out", "w", stdout);
    }
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    bool multitest = 0;
    int numTest = 1;
    if (multitest) cin >> numTest;

    while (numTest--) {
        solve();
    }

    return 0;
}

/* Lak lu theo dieu nhac!!!! */

Compilation message (stderr)

rima.cpp: In function 'int32_t main()':
rima.cpp:99:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   99 |         freopen(task".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
rima.cpp:100:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  100 |         freopen(task".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 140 / 140