Submission #100843

#	Time	Username	Problem	Language	Result	Execution time	Memory
100843		dalgerok	Savez (COCI15_savez)	C++17	48 / 120	166 ms	65332 KiB

savez

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


const int N = 505, M = 2e6 + 5, MOD1 = 1e9 + 1337, MOD2 = 999888777;


int n, p1[M], p2[M], ans;
map < pair < int, int >, int > dp;
vector < int > h1[N], h2[N];
string s[N];

inline pair < int, int > get(int i, int l, int r){
    return make_pair(
        (h1[i][r] - h1[i][l - 1] + MOD1) % MOD1 * p1[M - r] % MOD1,
        (h2[i][r] - h2[i][l - 1] + MOD2) % MOD2 * p2[M - r] % MOD2
    );
}

main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    p1[0] = p2[0] = 1;
    for(int i = 1; i < M; i++){
        p1[i] = p1[i - 1] * 59 % MOD1;
        p2[i] = p2[i - 1] * 45 % MOD2;
    }
    cin >> n;
    for(int i = 1; i <= n; i++){
        cin >> s[i];
        int sz = (int)s[i].size();
        h1[i].resize(sz + 2);
        h2[i].resize(sz + 2);
        for(int j = 1; j <= sz; j++){
            h1[i][j] = (h1[i][j - 1] + s[i][j - 1] * p1[j]) % MOD1;
            h2[i][j] = (h2[i][j - 1] + s[i][j - 1] * p2[j]) % MOD2;
        }
        int mx = 0;
        for(int j = 1; j <= sz; j++){
            auto it1 = get(i, 1, j),
                 it2 = get(i, sz - j + 1, sz);
            if(it1 == it2){
                mx = max(mx, dp[it1]);
            }
        }
        dp[get(i, 1, sz)] = mx + 1;
        ans = max(ans, mx + 1);
    }
    cout << ans;
}

Compilation message (stderr)

savez.cpp:21:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^

• Subtask 1: 12 / 12
• Subtask 2: 12 / 12
• Subtask 3: 12 / 12
• Subtask 4: 12 / 12
• Subtask 5: 0 / 12
• Subtask 6: 0 / 12
• Subtask 7: 0 / 12
• Subtask 8: 0 / 12
• Subtask 9: 0 / 12
• Subtask 10: 0 / 12