Submission #384496

#	Time	Username	Problem	Language	Result	Execution time	Memory
384496		valerikk	Coin Collecting (JOI19_ho_t4)	C++17	8 / 100	614 ms	640 KiB

joi2019_ho_t4

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;

#define x first
#define y second
#define all(a) (a).begin(), (a).end()

int main() {
#ifdef LOCAL
    freopen("input.txt", "r", stdin);
#endif 
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    ll ans = 0;
    vector<pair<int, int>> v;
    for (int i = 0; i < 2 * n; i++) {
        int x, y;
        cin >> x >> y;
        x--;
        y--;
        if (x < 0) {
            ans += -x;
            x = 0;
        }
        if (x > n - 1) {
            ans += x - n + 1;
            x = n - 1;
        }
        if (y < 0) {
            ans += -y;
            y = 0;
        }
        if (y > 1) {
            ans += y - 1;
            y = 1;
        }
        v.push_back({x, y});
    }
    sort(v.begin(), v.end());
    ll mn = 1e18;
    for (int mask = 0; mask < (1 << (2 * n)); mask++) {
        vector<int> a, b;
        for (int i = 0; i < 2 * n; i++) {
            int y = v[i].y ^ ((mask >> i) & 1);
            if (y) {
                a.push_back(v[i].x);
            } else {
                b.push_back(v[i].x);
            }
        }
        if (a.size() != n) continue;
        ll s = __builtin_popcount(mask);
        for (int i = 0; i < n; i++) {
            s += abs(a[i] - i);
            s += abs(b[i] - i);
        }
        mn = min(mn, s);
    }
    ans += mn;
    cout << ans << endl;
    return 0;
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'int main()':
joi2019_ho_t4.cpp:57:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   57 |         if (a.size() != n) continue;
      |             ~~~~~~~~~^~~~

• Subtask 1: 8 / 8
• Subtask 2: 0 / 29
• Subtask 3: 0 / 63