제출 #155664

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
155664		popovicirobert	Exhibition (JOI19_ho_t2)	C++14	0 / 100	2 ms	504 KiB

joi2019_ho_t2

#include <bits/stdc++.h>
#define lsb(x) (x & (-x))
#define ll long long
#define ull unsigned long long



#if 0
const int MOD = ;

inline int lgput(int a, int b) {
    int ans = 1;
    while(b > 0) {
        if(b & 1) ans = (1LL * ans * a) % MOD;
        b >>= 1;
        a = (1LL * a * a) % MOD;
    }
    return ans;
}

inline void mod(int &x) {
    if(x >= MOD)
        x -= MOD;
}

inline void add(int &x, int y) {
    x += y;
    mod(x);
}

inline void sub(int &x, int y) {
    x += MOD - y;
    mod(x);
}

inline void mul(int &x, int y) {
    x = (1LL * x * y) % MOD;
}

inline int inv(int x) {
    return lgput(x, MOD - 2);
}
#endif

#if 0
int fact[], invfact[];

inline void prec(int n) {
    fact[0] = 1;
    for(int i = 1; i <= n; i++) {
        fact[i] = (1LL * fact[i - 1] * i) % MOD;
    }
    invfact[n] = lgput(fact[n], MOD - 2);
    for(int i = n - 1; i >= 0; i--) {
        invfact[i] = (1LL * invfact[i + 1] * (i + 1)) % MOD;
    }
}

inline int comb(int n, int k) {
    if(n < k) return 0;
    return (1LL * fact[n] * (1LL * invfact[k] * invfact[n - k] % MOD)) % MOD;
}
#endif

using namespace std;



int main() {
#if 0
    ifstream cin("A.in");
    ofstream cout("A.out");
#endif
    int i, n, m;
    ios::sync_with_stdio(false);
    cin.tie(0), cout.tie(0);

    cin >> n >> m;

    vector < pair <int, int> > a(n);
    for(i = 0; i < n; i++) {
        cin >> a[i].second >> a[i].first;
    }
    sort(a.begin(), a.end());

    vector < pair <int, int> > b(n);
    for(i = 0; i < n; i++) {
        b[i] = {a[i].second, i};
    }
    sort(b.begin(), b.end());

    vector <int> c(m);
    for(i = 0; i < m; i++) {
        cin >> c[i];
    }
    sort(c.begin(), c.end());

    auto check = [&](int p) -> bool {
        vector <bool> vis(n, 0);
        for(int i = 0; i < p; i++) {
            vis[b[i].second] = 1;
        }

        int pos = 0;
        for(int i = 0; i < n; i++) {
            if(vis[i]) {
                while(pos < m && c[pos] < a[i].second) {
                    pos++;
                }
                if(pos == m) {
                    return 0;
                }
                pos++;
            }
        }
        return 1;
    };

    int res = 0;
    for(int step = 1 << 17; step; step >>= 1) {
        if(res + step <= min(n, m) && check(res + step)) {
            res += step;
        }
    }

    cout << res;

    return 0;
}

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