Submission #139612

#	Time	Username	Problem	Language	Result	Execution time	Memory
139612		mechfrog88	Exhibition (JOI19_ho_t2)	C++14	0 / 100	2 ms	376 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
#pragma GCC optimize("unroll-loops,no-stack-protector")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
 
using namespace __gnu_pbds;
using namespace std;
 
template <typename T>
using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
 
typedef long long ll;
typedef long double ld;

struct pic{
    ll v,s;
    bool operator <(const pic& rhs) const{
        return s < rhs.s;
    }
};

ll k;
vector <ll> bit;

void modify(ll x,ll delta){
    for (;x<=k;x+= x&-x){
        bit[x] = max(bit[x],delta);
    }
}

ll query(ll x){
    ll ans = 0;
    for (;x>0;x-= x&-x){
        ans = max(ans,bit[x]);
    }
    return ans;
}
 
int main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    ll n,m;
    cin >> n >> m;
    vector <pic> arr(n);
    for (int z=0;z<n;z++){
        cin >> arr[z].s >> arr[z].v;
    }
    vector <ll> frame(m);
    for (int z=0;z<m;z++){
        cin >> frame[z];
    }
    sort(arr.begin(),arr.end());
    sort(frame.begin(),frame.end());
    ll i = 0;
    vector <ll> lol;
    set <ll> s;
    for (int z=0;z<n && i < m;z++,i++){
        while (i < m && arr[z].s > frame[i]){
            i++;
        }
        if (i != m){
            lol.push_back(arr[z].v);
            s.insert(arr[z].v);
        }
    }
    unordered_map <ll,ll> mapp;
    ll c = 1;
    for (auto it = s.begin();it != s.end();it++){
        mapp[*it] = c;
        c++;
    }
    k = lol.size();
    vector <ll> dp(k);
    bit.resize(k+1);
    ll ans = 0;
    for (int z=0;z<k;z++){
        dp[z] = query(mapp[lol[z]]);
        dp[z]++;
        modify(mapp[lol[z]],dp[z]); 
        ans = max(ans,dp[z]);   
    }
    cout << ans << endl;
}

• Subtask 1: 0 / 10
• Subtask 2: 0 / 40
• Subtask 3: 0 / 50