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답안 #542030

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
542030 2022-03-25T07:58:53 Z FatihSolak 회문 (APIO14_palindrome) C++17
23 / 100
 1000 ms 34752 KB 
#include <bits/stdc++.h>
#define N 300005
#define K 30
using namespace std;
const int base = 31;
const int mod = 1e9 + 7;
const int base2 = 37;
const int mod2 = 1e9 + 9;
int cnt[N][K];
int val[N];
long long pre[N];
long long pw[N];
long long pre2[N];
long long pw2[N];
vector<int> palindromes[N];
void solve(){
    string s;
    cin >> s;
    int n = s.size();
    s = "." + s;
    for(int i=1;i<=n;i++){
        pre[i] = (pre[i-1] * base + (s[i] - 'a'))%mod;
        pre2[i] = (pre2[i-1] * base2 + (s[i] - 'a'))%mod2;
    }
    long long ans = 0;
    map<string,int> mp;
    for(int i = n;i>=1;i--){
        if(i == n || s[i+1] != s[i]){
            val[i] = 1;
        }
        else val[i] = val[i+1] + 1;
        palindromes[i].push_back(i + val[i] - 1);
        cnt[val[i]][s[i] - 'a']++;
        for(auto u:palindromes[i+1]){
            if(u + 1 <= n && s[u+1] == s[i] && u + 1 > i + val[i] - 1){
                palindromes[i].push_back(u+1);
            }
        }
        for(auto u:palindromes[i]){
            //cout << u << " " << s.substr(i,u - i + 1) << " ";
            ans = max(ans,1ll*(u-i + 1) * (++mp[s.substr(i,u - i + 1)]));
        }
        //cout << endl;
    }
    for(int i=n;i>=1;i--){
        for(int c = 0;c<K;c++){
            cnt[i][c] += cnt[i+1][c];
            ans = max(ans,1ll*i*cnt[i][c]);
        }
    }
    cout << ans;
}

int32_t main(){
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    #ifdef Local
    freopen("in.txt","r",stdin);
    freopen("out.txt","w",stdout);
    #endif
    pw[0] = 1;
    pw2[0] = 1;
    for(int i = 1;i<N;i++){
        pw[i] = pw[i-1] * base % mod;
        pw2[i] = pw2[i-1] * base2 % mod2;
    }
    int t=1;
    //cin>>t;
    while(t--){
        solve();
    }
    #ifdef Local
    cout<<endl<<fixed<<setprecision(2)<<1000.0 * clock() / CLOCKS_PER_SEC<< " milliseconds ";
    #endif
}

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 9 ms 12120 KB Output is correct
2 Correct 8 ms 11988 KB Output is correct
3 Correct 8 ms 11988 KB Output is correct
4 Correct 8 ms 11968 KB Output is correct
5 Correct 7 ms 12068 KB Output is correct
6 Correct 7 ms 11988 KB Output is correct
7 Correct 8 ms 12092 KB Output is correct
8 Correct 7 ms 11988 KB Output is correct
9 Correct 7 ms 12036 KB Output is correct
10 Correct 9 ms 11988 KB Output is correct
11 Correct 8 ms 11988 KB Output is correct
12 Correct 8 ms 11988 KB Output is correct
13 Correct 8 ms 11988 KB Output is correct
14 Correct 8 ms 11988 KB Output is correct
15 Correct 7 ms 11988 KB Output is correct
16 Correct 11 ms 12076 KB Output is correct
17 Correct 8 ms 11996 KB Output is correct
18 Correct 8 ms 11972 KB Output is correct
19 Correct 7 ms 12068 KB Output is correct
20 Correct 7 ms 12116 KB Output is correct
21 Correct 8 ms 12116 KB Output is correct
22 Correct 7 ms 11988 KB Output is correct
23 Correct 8 ms 12116 KB Output is correct
24 Correct 8 ms 12000 KB Output is correct
25 Correct 9 ms 11988 KB Output is correct
26 Correct 8 ms 12116 KB Output is correct
27 Correct 9 ms 11988 KB Output is correct
28 Correct 8 ms 12116 KB Output is correct
29 Correct 9 ms 12104 KB Output is correct
30 Correct 8 ms 12064 KB Output is correct
31 Correct 8 ms 11988 KB Output is correct
32 Correct 8 ms 12104 KB Output is correct

Subtask #2
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 62 ms 14056 KB Output is correct
2 Correct 27 ms 13176 KB Output is correct
3 Correct 10 ms 12756 KB Output is correct
4 Correct 12 ms 12500 KB Output is correct
5 Correct 8 ms 12756 KB Output is correct
6 Correct 9 ms 12756 KB Output is correct
7 Correct 9 ms 12628 KB Output is correct
8 Correct 62 ms 14160 KB Output is correct
9 Correct 9 ms 12384 KB Output is correct
10 Correct 8 ms 12204 KB Output is correct
11 Correct 8 ms 12244 KB Output is correct
12 Correct 9 ms 12500 KB Output is correct

Subtask #3
0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1077 ms 30716 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #4
0 / 26.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1057 ms 32056 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 27.0

# 결과 실행 시간 메모리 Grader output
1 Execution timed out 1054 ms 34752 KB Time limit exceeded
2 Halted 0 ms 0 KB -