Submission #1148429

#	Time	Username	Problem	Language	Result	Execution time	Memory
1148429		mingga	Coin Collecting (JOI19_ho_t4)	C++20	100 / 100	24 ms	1864 KiB

joi2019_ho_t4

#include "bits/stdc++.h"

using namespace std;

#define ln "\n"
#define pb push_back
#define fi first
#define se second
#define all(x) (x).begin(), (x).end()
#define sz(x) ((int)(x).size())
#define int long long
const int mod = 1e9 + 7;
const int inf = 2e18;
const int N = 2e5 + 7;
int n, a[N][2];

signed main() {
	cin.tie(0) -> sync_with_stdio(0);
	#define task ""
	if(fopen(task ".INP", "r")) {
		freopen(task ".INP", "r", stdin);
		freopen(task ".OUT", "w", stdout);
	}
	cin >> n;
	int ans = 0;
	for(int i = 1; i <= 2 * n; i++) {
		int x, y; cin >> x >> y;
		if(x > n) {
			ans += (x - n);
			x = n;
		}
		if(x < 1) {
			ans += (1 - x);
			x = 1;
		}
		if(y > 2) {
			ans += (y - 2);
			y = 2;
		}
		if(y < 1) {
			ans += (1 - y);
			y = 1;	
		}
		a[x][y]++;
	}
	int d1 = 0, d2 = 0;
	for(int i = 1; i <= n; i++) {
		d1 += a[i][1] - 1;
		d2 += a[i][2] - 1;
		if(d1 > 0 and d2 < 0) {
			int ext = min(d1, -d2);
			ans += ext;
			d1 -= ext;
			d2 += ext;
		}
		if(d1 < 0 and d2 > 0) {
			int ext = min(-d1, d2);
			ans += ext;
			d1 += ext;
			d2 -= ext;
		}
		ans += abs(d1) + abs(d2);
	}
	cout << ans << ln;
  cerr << "\nTime: " << clock() * 1000 / CLOCKS_PER_SEC;
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'int main()':
joi2019_ho_t4.cpp:21:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |                 freopen(task ".INP", "r", stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t4.cpp:22:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |                 freopen(task ".OUT", "w", stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

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