Submission #481195

#	Time	Username	Problem	Language	Result	Execution time	Memory
481195		Lobo	Exhibition (JOI19_ho_t2)	C++17	0 / 100	0 ms	204 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
 
using namespace std;

const long long INFll = (long long) 1e18 + 10;
const int INFii = (int) 1e9 + 10;
typedef long long ll;
typedef int ii;
typedef long double dbl;
#define endl '\n'
#define sc second
#define fr first
#define mp make_pair
#define pb push_back
#define all(x) x.begin(), x.end()

#define maxn 100010

ii n, m, bit[maxn];
pair<ii,ii> p[maxn];

void att(ii pos, ii val) {
    for(ii i = pos; i <= m; i+= i&-i) {
        bit[i] = max(bit[i],val);
    }
}

ii query(ii pos) {
    ii ans = 0;
    for(ii i = pos; i > 0; i-= i&-i) {
        ans = max(ans, bit[i]);
    }

    return ans;
}

int main() {
    ios::sync_with_stdio(false); cin.tie(0);

    //freopen("in.in", "r", stdin);
    //freopen("out.out", "w", stdout);

    cin >> n >> m;

    for(ii i = 1; i <= n; i++) {
        cin >> p[i].sc >> p[i].fr;
    }

    vector<ii> c;
    for(ii i = 1; i <= m; i++) {
        ii x;cin >> x;
        c.pb(x);
    }
    c.pb(INFii);

    sort(p+1,p+1+n);
    sort(all(c));

    ii ans = 0;
    queue<pair<ii,ii>> q;
    for(ii i = 1; i <= n; i++) {
        ii x = lower_bound(all(c),p[i].sc)-c.begin()+1;
        ii qrr = query(x-1)+1;
        att(x,qrr);

        while(x <= q.front().fr) {
            att(q.front().fr,q.front().sc);
            q.pop();
        }

        q.push(mp(x+1,qrr+1));


    }

    cout << query(m) << endl;
}

Compilation message (stderr)

joi2019_ho_t2.cpp: In function 'int main()':
joi2019_ho_t2.cpp:59:8: warning: unused variable 'ans' [-Wunused-variable]
   59 |     ii ans = 0;
      |        ^~~

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