Submission #1180775

#	Time	Username	Problem	Language	Result	Execution time	Memory
1180775		patgra	Coin Collecting (JOI19_ho_t4)	C++20	100 / 100	25 ms	1096 KiB

joi2019_ho_t4

#include <bits/stdc++.h>

#define rep(a,b,c) for(auto a = (b); a != (c); a++)
#define repD(a,b,c) for(auto a = (b); a != (c); a--)
#define repIn(a, b) for(auto& a : (b))
#define repIn2(a, b, c) for(auto& [a, b] : (c))

constexpr bool dbg = 1;
#define DEBUG if constexpr(dbg)
#define DC DEBUG std::cerr
#define eol std::endl

#define ll long long
#define pb push_back

using namespace std;

int main() {
    ios_base::sync_with_stdio(false); cin.tie(nullptr); cout.tie(nullptr);
    int n;
    cin >> n;
    vector<pair<int, int>> arr(n, {-1, -1});
    ll ans = 0;
    rep(i, 0, 2 * n) {
        int x, y;
        cin >> x >> y;
        if(x < 1) ans += 1 - x, x = 1;
        if(x > n) ans += x - n, x = n;
        if(y < 1) ans += 1 - y, y = 1;
        if(y > 2) ans += y - 2, y = 2;
        x--;
        if(y == 1) arr[x].first++;
        else arr[x].second++;
    }
    rep(i, 0, n) {
        if(arr[i].first > 0 && arr[i].second < 0) {
            auto move = min(arr[i].first, -arr[i].second);
            arr[i].first -= move;
            arr[i].second += move;
            ans += move;
        }
        if(arr[i].first < 0 && arr[i].second > 0) {
            auto move = min(-arr[i].first, arr[i].second);
            arr[i].first += move;
            arr[i].second -= move;
            ans += move;
        }
        if(i == n - 1) continue;
        arr[i + 1].first += arr[i].first, ans += abs(arr[i].first), arr[i].first = 0;
        arr[i + 1].second += arr[i].second, ans += abs(arr[i].second), arr[i].second = 0;
    }
    cout << ans << '\n';
}

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