Submission #1221243

#	Time	Username	Problem	Language	Result	Execution time	Memory
1221243		Theo830	Hieroglyphs (IOI24_hieroglyphs)	C++20	0 / 100	28 ms	8776 KiB

hieroglyphs

#include <bits/stdc++.h>
using namespace std;
typedef int ll;
const ll INF = 1e9+7;
const ll MOD = 998244353;
typedef pair<ll,ll> ii;
#define iii pair<ii,ll>
#define f(i,a,b) for(ll i = a;i < b;i++)
#define pb push_back
#define vll vector<ll>
#define F first
#define S second
#define all(x) (x).begin(), (x).end()
///I hope I will get uprating and don't make mistakes
///I will never stop programming
///sqrt(-1) Love C++
///Please don't hack me
///@TheofanisOrfanou Theo830
///Think different approaches (bs,dp,greedy,graphs,shortest paths,mst)
///Stay Calm
///Look for special cases
///Beware of overflow and array bounds
///Think the problem backwards
///Training
#include "hieroglyphs.h"
vector<int> ucs(std::vector<int> a, std::vector<int> b){
    vector<int>ans;
    vector<int>ex[200005];
    f(i,0,b.size()){
        ex[b[i]].pb(i);
    }
    f(i,0,200005){
        reverse(all(ex[i]));
    }
    ll posi = 0;
    for(auto x:a){
        while(!ex[x].empty() && ex[x].back() < posi){
            ex[x].pop_back();
        }
        if(!ex[x].empty()){
            posi = ex[x].back() + 1;
            ans.pb(x);
        }
    }
    bool ok = 1;
    ll pos = 0;
    for(auto x:a){
        if(pos < ans.size() && ans[pos] == x){
            pos++;
        }
    }
    ok &= pos == (ll)ans.size();
    pos = 0;
    for(auto x:b){
        if(pos < ans.size() && ans[pos] == x){
            pos++;
        }
    }
    ok &= pos == (ll)ans.size();
    if(!ok){
        ans.clear();
        ans.pb(-1);
    }
    return ans;
}

• Subtask 0: 0 / 0
• Subtask 1: 0 / 3
• Subtask 2: 0 / 15
• Subtask 3: 0 / 10
• Subtask 4: 0 / 16
• Subtask 5: 0 / 14
• Subtask 6: 0 / 42