Submission #748364

#	Time	Username	Problem	Language	Result	Execution time	Memory
748364		GrindMachine	Abduction 2 (JOI17_abduction2)	C++17	23 / 100	5033 ms	256176 KiB

abduction2

// 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 = 2e3 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

ll n,m,q;
vector<ll> a(N), b(N);
ll dp[N][N][4];

ll go(ll i, ll j, ll d){
    if(i < 1 or i > n or j < 1 or j > m) return -inf1;
    if(dp[i][j][d] != -1) return dp[i][j][d];

    ll ans = 0;

    if(d <= 1){
        if(b[j] > a[i]){
            amax(ans, 1 + go(i-1,j,2));
            amax(ans, 1 + go(i+1,j,3));
        }
        else{
            if(d == 0){
                amax(ans, 1 + go(i,j-1,d));
            }
            else{
                amax(ans, 1 + go(i,j+1,d));
            }
        }
    }
    else{
        if(a[i] > b[j]){
            amax(ans, 1 + go(i,j-1,0));
            amax(ans, 1 + go(i,j+1,1));       
        }
        else{
            if(d == 2){
                amax(ans, 1 + go(i-1,j,d));
            }
            else{
                amax(ans, 1 + go(i+1,j,d));
            }
        }
    }

    return dp[i][j][d] = ans;
}

void solve(int test_case)
{
    cin >> n >> m >> q;
    rep1(i,n) cin >> a[i];
    rep1(i,m) cin >> b[i];

    while(q--){
        ll i,j; cin >> i >> j;
        memset(dp,-1,sizeof dp);
        ll ans = 1 + max({go(i,j-1,0), go(i,j+1,1), go(i-1,j,2), go(i+1,j,3)});
        cout << ans << endl;
    }
}

int main()
{
    fastio;

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

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

    return 0;
}

• Subtask 1: 13 / 13
• Subtask 2: 10 / 10
• Subtask 3: 0 / 17
• Subtask 4: 0 / 4
• Subtask 5: 0 / 56