oj.uz

Submission #701228

# Submission time Handle Problem Language Result Execution time Memory
701228 2023-02-20T15:11:00 Z Do_you_copy Rima (COCI17_rima) C++17
140 / 140
 341 ms 205132 KB 
#include <bits/stdc++.h>
#define fi first
#define se second
#define pb push_back
#define faster ios_base::sync_with_stdio(0); cin.tie(0);

using namespace std;
using ll = long long;
using pii = pair <int, int>;

const int maxN = 3e6 + 10;
const int inf = 0x3f3f3f3f;
int n;
string s[maxN];

struct TNode{
    int a[26];
    bool ok;
    TNode(){
        memset(a, 0, sizeof(a));
        ok = 0;
    }
};

vector <TNode> S(1);
int dp[maxN];

void add(int id, int cur, int pos){
    if (pos == signed(s[cur].length())){
        S[id].ok = 1;
        return;
    }
    if (!S[id].a[s[cur][pos] - 'a']){
        S[id].a[s[cur][pos]- 'a'] = S.size();
        S.pb(TNode());
    }
    add(S[id].a[s[cur][pos] - 'a'], cur, pos + 1);
}

int ans = 0;
void dfs(int u){
    pii maxx = {1, 1};
    int cnt = S[u].ok;
    for (int i = 0; i < 26; ++i){
        if (S[u].a[i]){
            dfs(S[u].a[i]);
            cnt += bool(dp[S[u].a[i]]);
            if (maxx.fi < dp[S[u].a[i]]){
                swap(maxx.fi, maxx.se);
                maxx.fi = dp[S[u].a[i]];
            }
            else{
                maxx.se = max(maxx.se, dp[S[u].a[i]]);
            }
        }
    }
    ans = max(ans, maxx.fi + maxx.se + cnt - 2);
    if (S[u].ok) dp[u] = maxx.fi + cnt - 1;
}

void Init(){
    cin >> n;
    for (int i = 1; i <= n; ++i){
        cin >> s[i];
        reverse(s[i].begin(), s[i].end());
        add(0, i, 0);
    }
    dfs(0);
    cout << ans;
}

#define taskname "test"

signed main(){
    if (fopen(taskname ".inp", "r")){
        freopen(taskname ".inp", "r", stdin);
        freopen(taskname ".out", "w", stdout);
    }
    int tt = 1;
    //cin >> tt;
    while (tt--){
        Init();
    }
}

Compilation message

rima.cpp: In function 'int main()':
rima.cpp:76:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   76 |         freopen(taskname ".inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
rima.cpp:77:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   77 |         freopen(taskname ".out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
140.0 / 140.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 94284 KB Output is correct
2 Correct 47 ms 94296 KB Output is correct
3 Correct 47 ms 94316 KB Output is correct
4 Correct 341 ms 205132 KB Output is correct
5 Correct 115 ms 98924 KB Output is correct
6 Correct 144 ms 150668 KB Output is correct
7 Correct 118 ms 150336 KB Output is correct
8 Correct 114 ms 150160 KB Output is correct
9 Correct 181 ms 155540 KB Output is correct
10 Correct 122 ms 150312 KB Output is correct