Submission #563349

#	Time	Username	Problem	Language	Result	Execution time	Memory
563349		armashka	Exhibition (JOI19_ho_t2)	C++17	0 / 100	4 ms	4968 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
 
#pragma comment(linker, "/stack:200000000")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2,tune=native")
 
#define fast ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file(s) freopen(s".in", "r", stdin);freopen(s".out", "w", stdout);
#define nano chrono::steady_clock::now().time_since_epoch().count()
#define uid uniform_int_distribution<int>
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define pb push_back
#define sz size()
#define ft first
#define sd second
 
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef unsigned long long ull;
    
const int N = 2e5 + 10;
const int M = 2e3 + 5;
const ll inf = 1e15;
const ll mod = 1e9 + 7;
const double Pi = acos(-1); 
 
ll binpow(ll x, ll ti) { ll res = 1;while (ti){if(ti & 1)res *= x;x *= x;ti >>= 1; x %= mod; res %= mod;} return res;}
ll binmul(ll x, ll ti) { ll res = 0;while (ti){if(ti & 1)res += x;x += x;ti >>= 1; x %= mod; res %= mod;} return res;}
ll random(ll l, ll r) { mt19937 rnd(nano); uid dist(l, r); return dist(rnd); }
ll nok(ll a, ll b) { return (a*b)/__gcd(abs(a),abs(b)) * (a*b > 0 ? 1 : -1); }
bool odd(ll n) { return (n % 2 == 1); }                                   
bool even(ll n) { return (n % 2 == 0); }

ll n, m, b[N], dp[N], pp[N];
pll a[N];
vector <ll> g[N];
bool used[N];

const void solve(/*Armashka*/) {
    cin >> n >> m;
    for (int i = 1; i <= n; ++ i) cin >> a[i].ft >> a[i].sd;
    for (int i = 1; i <= m; ++ i) cin >> b[i];

    sort(a + 1, a + n + 1);
    sort(b + 1, b + m + 1);

    for (int i = 1; i < n; ++ i) {
        for (int j = i + 1; j <= n; ++ j) {
            if (a[j].sd >= a[i].sd) {
                used[j] = 1;
                g[i].pb(j);
            }
        }
    }
    queue <ll> q;
    for (int i = 1; i <= n; ++ i) {
        if (!used[i]) {
            ll l = 1, r = m, np = -1;
            while (l <= r) {
                ll mid = (l + r) / 2;
                if (b[mid] >= a[i].ft) r = mid - 1, np = mid;
                else l = mid + 1;
            }
            if (~np) {
                q.push(i);
                pp[i] = np;
                dp[i] = 1;
            }
        }
    }
    while (q.sz) {
        ll v = q.front();
        ll pos = pp[v] + 1;
        q.pop();
        if (pos > m) continue;
        for (auto to : g[v]) {
            ll l = pos, r = m, np = -1;
            while (l <= r) {
                ll mid = (l + r) / 2;
                if (b[mid] >= a[to].ft) r = mid - 1, np = mid;
                else l = mid + 1;
            }
            if (~np && dp[to] < dp[v] + 1) {
                dp[to] = dp[v] + 1;
                pp[to] = np;
                q.push(to);
            } else if (~np && dp[to] == dp[v] + 1 && pp[to] > np) {
                pp[to] = np;
                q.push(to);
            }
        }
    }
    ll ans = 0;
    for (int i = 1; i <= n; ++ i) ans = max(ans, dp[i]);
    cout << ans;
}

signed main() {
    srand(time(NULL));
    fast;
    // file("");
    int tt = 1;

    // cin >> tt;
    for (int i = 1; i <= tt; ++ i) {
        solve();
    }        
}
// Andetemin sen uwin de, men uwin de, yerten bolsyn dep
// Qara kunder artta, wekara joq alda

Compilation message (stderr)

joi2019_ho_t2.cpp:5: warning: ignoring '#pragma comment ' [-Wunknown-pragmas]
    5 | #pragma comment(linker, "/stack:200000000")
      |

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