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Submission #252711

# Submission time Handle Problem Language Result Execution time Memory
252711 2020-07-26T07:18:01 Z VEGAnn Savez (COCI15_savez) C++14
120 / 120
 100 ms 10104 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#define sz(x) ((int)x.size())
#define all(x) x.begin(),x.end()
#define PB push_back
using namespace std;
using namespace __gnu_pbds;
typedef long long ll;
const int N = 2000100;
const int md = 998244353;
const int PW = 233;
gp_hash_table<int, int> mem;
string s;
int n, suf[N], po[N], ans;

int mult(int x, int y) { return (1ll * x * y) % md; }

int sub(int x, int y){
    x -= y;
    if (x < 0)
        x += md;
    return x;
}

int sum(int x, int y){
    x += y;
    if (x >= md)
        x -= md;
    return x;
}

int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);

#ifdef _LOCAL
    freopen("in.txt","r",stdin);
#endif // _LOCAL

    cin >> n;

    po[0] = 1;

    for (int i = 1; i < N; i++)
        po[i] = mult(po[i - 1], PW);

    for (int i = 0; i < n; i++){
        cin >> s;

        int len = sz(s);

        suf[len] = 0;

        for (int i = len - 1; i >= 0; i--)
            suf[i] = sum((s[i] - 'A') + 1, mult(PW, suf[i + 1]));

        int res = 1;

        for (int l = 1; l <= len; l++){
            int pf = sub(suf[0], mult(suf[l], po[l]));
            int sf = suf[len - l];

            if (pf != sf) continue;

            if (mem.find(pf) == mem.end()) continue;

            res = max(res, 1 + mem[pf]);
        }

        ans = max(ans, res);

        mem[suf[0]] = max(mem[suf[0]], res);
    }

    cout << ans;

    return 0;
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 8192 KB Output is correct
2 Correct 15 ms 8192 KB Output is correct
3 Correct 15 ms 8192 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 15 ms 8192 KB Output is correct
2 Correct 15 ms 8192 KB Output is correct
3 Correct 18 ms 8320 KB Output is correct

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 31 ms 9080 KB Output is correct
2 Correct 32 ms 9216 KB Output is correct
3 Correct 37 ms 9208 KB Output is correct

Subtask #4
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 16 ms 8192 KB Output is correct
2 Correct 31 ms 9216 KB Output is correct
3 Correct 32 ms 9216 KB Output is correct

Subtask #5
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 30 ms 9208 KB Output is correct
2 Correct 30 ms 9240 KB Output is correct

Subtask #6
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 32 ms 9208 KB Output is correct
2 Correct 32 ms 9216 KB Output is correct

Subtask #7
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 33 ms 9208 KB Output is correct
2 Correct 33 ms 9208 KB Output is correct

Subtask #8
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 37 ms 9208 KB Output is correct
2 Correct 34 ms 9208 KB Output is correct

Subtask #9
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 46 ms 9340 KB Output is correct
2 Correct 52 ms 9336 KB Output is correct

Subtask #10
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 65 ms 9592 KB Output is correct
2 Correct 58 ms 9592 KB Output is correct
3 Correct 100 ms 10104 KB Output is correct