Submission #711173

#	Time	Username	Problem	Language	Result	Execution time	Memory
711173		Nhoksocqt1	Boxes with souvenirs (IOI15_boxes)	C++17	10 / 100	1 ms	212 KiB

boxes

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

#define inf 0x3f3f3f3f
#define sz(x) int((x).size())
#define fi first
#define se second
typedef long long ll;
typedef pair<int, int> ii;

template<class X, class Y>
	inline bool maximize(X &x, const Y &y) {return (x < y ? x = y, 1 : 0);}
template<class X, class Y>
	inline bool minimize(X &x, const Y &y) {return (x > y ? x = y, 1 : 0);}

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
int Random(int l, int r) {
    return uniform_int_distribution<int>(l, r)(rng);
}

const int MAXN = 1e7+7;

int a[MAXN], nArr, k, L;

#ifdef Nhoksocqt1

int delivery(int _N, int _K, int _L, int _pos[]);

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);

    freopen("BOXES.inp", "r", stdin);
    freopen("BOXES.out", "w", stdout);

    process();
    return 0;
}

#endif // Nhoksocqt1

ll delivery(int _N, int _K, int _L, int _pos[]) {
    nArr = _N, k = _K, L = _L;
    for (int i = 1; i <= nArr; ++i)
        a[i] = _pos[i - 1];

    sort(a + 1, a + nArr + 1);

    ll result(0);
    int l(1), r(nArr);
    while(l <= r) {
        int costLeft = min(_L, 2 * a[min(r, l + _K - 1)]);
        int costRight = min(_L, 2 * (_L - a[max(l, r - _K + 1)]));

        result += min(costLeft, costRight);
        if(costLeft <= costRight) {
            l += _K;
        } else {
            r -= _K;
        }
    }

    return result;
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 15
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30