oj.uz

Submission #800246

# Submission time Handle Problem Language Result Execution time Memory
800246 2023-08-01T12:43:21 Z GrindMachine Necklace (Subtask 1-3) (BOI19_necklace1) C++17
45 / 85
 1500 ms 106444 KB 
// Om Namah Shivaya

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x, y) ((x + y - 1) / (y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "Yes" << endl
#define no cout << "No" << endl

#define rep(i, n) for(int i = 0; i < n; ++i)
#define rep1(i, n) for(int i = 1; i <= n; ++i)
#define rev(i, s, e) for(int i = s; i >= e; --i)
#define trav(i, a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a, b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a, b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*

refs:
edi

*/

const int MOD = 1e9 + 7;
const int N = 3e3 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

int lss[N][N], lsp[N][N], lps[N][N];

void solve(int test_case)
{
    string s,t; cin >> s >> t;
    int n = sz(s), m = sz(t);
    s = "$" + s;
    t = "$" + t;

    auto go = [&]() -> array<int,3> {
        memset(lss,0,sizeof lss);
        memset(lsp,0,sizeof lsp);
        memset(lps,0,sizeof lps);

        rep1(i,n){
            rep1(j,m){
                if(s[i] == t[j]){
                    lss[i][j] = 1 + lss[i-1][j-1];
                }
            }
        }

        rep1(i,n){
            rep1(j,m){
                int l = lss[i][j];
                for(int k = j-l+1; k <= j; ++k){
                    amax(lsp[i][k],j-k+1);
                }
                for(int k = i-l+1; k <= i; ++k){
                    amax(lps[k][j],i-k+1);
                }
            }
        }

        array<int,3> res;
        res.fill(-1);

        rep1(i,n){
            rep1(j,m){
                int l1 = lsp[i][j];
                int l2 = lps[i+1][j-1];
                int len = l1+l2;
                array<int,3> curr = {len,i-l1,j-l2-1};
                amax(res,curr);
            }
        }

        return res;
    };

    auto ans1 = go();
    reverse(t.begin()+1,t.end());
    auto ans2 = go();

    ans2[2] = m-1-ans2[2];
    ans2[2] -= ans2[0];
    ans2[2]++;

    auto ans = max(ans1,ans2);

    cout << ans[0] << endl;
    cout << ans[1] << " " << ans[2] << endl;
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 106320 KB Output is correct
2 Correct 46 ms 106260 KB Output is correct
3 Correct 46 ms 106328 KB Output is correct
4 Correct 49 ms 106328 KB Output is correct
5 Correct 45 ms 106264 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 106320 KB Output is correct
2 Correct 46 ms 106260 KB Output is correct
3 Correct 46 ms 106328 KB Output is correct
4 Correct 49 ms 106328 KB Output is correct
5 Correct 45 ms 106264 KB Output is correct
6 Correct 95 ms 106328 KB Output is correct
7 Correct 65 ms 106332 KB Output is correct
8 Correct 54 ms 106312 KB Output is correct
9 Correct 56 ms 106268 KB Output is correct
10 Correct 52 ms 106444 KB Output is correct
11 Correct 49 ms 106204 KB Output is correct
12 Correct 54 ms 106204 KB Output is correct

Subtask #3
0.0 / 40.0

# Verdict Execution time Memory Grader output
1 Correct 47 ms 106320 KB Output is correct
2 Correct 46 ms 106260 KB Output is correct
3 Correct 46 ms 106328 KB Output is correct
4 Correct 49 ms 106328 KB Output is correct
5 Correct 45 ms 106264 KB Output is correct
6 Correct 95 ms 106328 KB Output is correct
7 Correct 65 ms 106332 KB Output is correct
8 Correct 54 ms 106312 KB Output is correct
9 Correct 56 ms 106268 KB Output is correct
10 Correct 52 ms 106444 KB Output is correct
11 Correct 49 ms 106204 KB Output is correct
12 Correct 54 ms 106204 KB Output is correct
13 Execution timed out 1576 ms 106292 KB Time limit exceeded
14 Halted 0 ms 0 KB -