Submission #142975

#	Time	Username	Problem	Language	Result	Execution time	Memory
142975		popovicirobert	Bodyguards (CEOI10_bodyguards)	C++14	100 / 100	241 ms	20204 KiB

bodyguards

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



/*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);
}*/

/*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;
}*/

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;
    ll sum = 0;
    vector < pair <ll, ll> > r(n);
    for(auto &it : r) {
        cin >> it.first >> it.second;
        sum += it.first * it.second;
    }
    cin >> m;
    vector < pair <ll, ll> > c(m);
    for(auto &it : c) {
        cin >> it.first >> it.second;
        sum -= it.first * it.second;
    }

    if(sum != 0) {
        cout << 0;
        return 0;
    }

    sort(r.rbegin(), r.rend());
    sort(c.rbegin(), c.rend());

    vector <ll> t, spr(n), spc(m);
    for(i = 0; i < m; i++) {
        spc[i] = (i > 0 ? spc[i - 1] : 0) + c[i].first * c[i].second;
        c[i].second += (i > 0 ? c[i - 1].second : 0);
        t.push_back(c[i].second);
    }
    for(i = 0; i < n; i++) {
        spr[i] = (i > 0 ? spr[i - 1] : 0) + r[i].first * r[i].second;
        r[i].second += (i > 0 ? r[i - 1].second : 0);
        if(r[i].second <= c.back().second)
            t.push_back(r[i].second);
    }
    sort(t.begin(), t.end());

    auto get = [&](ll k) {
        int res = -1;
        for(int step = 1 << 17; step; step >>= 1) {
            if(res + step < m && c[res + step].second < k) {
                res += step;
            }
        }
        ll last = (res >= 0 ? c[res].second : 0);
        return (res >= 0 ? spc[res] : 0) + (k - last) * c[res + 1].first;
    };

    int p = n - 1;
    for(auto k : t) {
        while(p >= 0 && r[p].first <= k) {
            p--;
        }
        ll sumr = k * (p >= 0 ? r[p].second : 0) + spr[n - 1] - (p >= 0 ? spr[p] : 0);
        ll sumc = get(k);
        if(sumr < sumc) {
            cout << 0;
            return 0;
        }
    }

    cout << 1;

    return 0;
}

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10