Submission #881601

#	Time	Username	Problem	Language	Result	Execution time	Memory
881601		tsumondai	Coin Collecting (JOI19_ho_t4)	C++14	100 / 100	38 ms	8316 KiB

joi2019_ho_t4

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

#define int long long
#define fi first
#define se second
#define pb push_back
#define mp make_pair
#define foru(i, l, r) for(int i = l; i <= r; i++)
#define ford(i, r, l) for(int i = r; i >= l; i--)
#define __TIME  (1.0 * clock() / CLOCKS_PER_SEC)

typedef pair<int, int> ii;
typedef pair<ii, int> iii;
typedef pair<ii, ii> iiii;
 
const int N = 1e6 + 5;
 
const int oo = 1e9, mod = 1e9 + 7;
 
int n, k, x, y, a, b, ans=0;
int m[N][3];

void process() {
	cin >> n;
	foru(i,1,n*2) {
		int x, y; cin >> x >> y;
		if (x<1) ans+=1-x, x=1;
		else if (x>n) ans+=x-n, x=n;
		if (y<1) ans+=1-y, y=1;
		else if (y>2) ans+=y-2, y=2;
		m[x][y]++;
	}
	foru(i,1,n) {
		a+=m[i][1]-1, b+=m[i][2]-1;
		while (a>0 && b<0) a--, b++, ans++;
		while (a<0 && b>0) a++, b--, ans++;
		ans+=(abs(a) + (abs(b)));
	}
	cout << ans;
    return;
}

signed main() {
    cin.tie(0)->sync_with_stdio(false);
    //freopen(".inp", "r", stdin);
    //freopen(".out", "w", stdout);
    process();
    cerr << "Time elapsed: " << __TIME << " s.\n";
    return 0;
}

/*
Xét các trường hợp đặc biệt
Kiểm tra lại input/output
Cố gắng trâu
Lật ngược bài toán
Keep calm and get VOI 
Flow:

*/

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