Submission #136414

#	Time	Username	Problem	Language	Result	Execution time	Memory
136414		popovicirobert	Kitchen (BOI19_kitchen)	C++14	0 / 100	8 ms	504 KiB

kitchen

#include <bits/stdc++.h>
#pragma GCC optimize ("Ofast")
#define lsb(x) (x & (-x))
#define ll long long
#define ull unsigned long long
// 217
// 44


/*const int MOD = (int) 1e9 + 7;

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;
}*/

/*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;

struct Comp {
    int val;
    bool operator <(const Comp &other) const {
        return val > other.val;
    }
};

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

    cin >> n >> m >> k;

    vector <int> a(n);
    for(i = 0; i < n; i++) {
        cin >> a[i];
    }

    multiset <Comp> mst;
    for(i = 0; i < m; i++) {
        int x;
        cin >> x;
        mst.insert({x});
    }

    for(i = 0; i < n; i++) {
        while(mst.size() && prev(mst.end()) -> val == 0) {
            mst.erase(prev(mst.end()));
        }
        if(mst.size() < k || a[i] < k) {
            cout << "Impossible";
            return 0;
        }

        a[i] -= k;

        auto it = mst.begin();
        vector <int> cur;

        for(int j = 0; j < k; j++) {
            cur.push_back(it -> val - 1);
            it = next(it);
        }

        mst.erase(mst.begin(), it);
        for(int j = 0; j < k; j++) {
            mst.insert({cur[j]});
        }
    }

    for(i = 0; i < n; i++) {
        while(a[i] > 0) {
            a[i]--;
            int val = mst.begin() -> val;
            if(val == 0) {
                cout << "Impossible";
                return 0;
            }
            mst.erase(mst.begin());
            mst.insert({val - 1});
        }
    }

    int ans = 0;
    for(auto it : mst) {
        ans += it.val;
    }

    cout << ans;

    return 0;
}

Compilation message (stderr)

kitchen.cpp: In function 'int main()':
kitchen.cpp:93:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if(mst.size() < k || a[i] < k) {
            ~~~~~~~~~~~^~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 22
• Subtask 3: 0 / 20
• Subtask 4: 0 / 21
• Subtask 5: 0 / 28