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Submission #921971

# Submission time Handle Problem Language Result Execution time Memory
921971 2024-02-04T15:24:00 Z WLZ Palembang Bridges (APIO15_bridge) C++17
22 / 100
 96 ms 10172 KB 
#include <bits/stdc++.h>
#define int long long
#define sz(x) (long long)(x.size())
 
using namespace std;
 
struct traj{
	int l, r;
	long double mid;
};
vector <traj> a;
 
int score(int mid) {
	int ans(0);
	vector<int> b;
	int i(0);
	for (;i < sz(a) && a[i].mid <= mid ; i++){
		b.push_back(a[i].l);
		b.push_back(a[i].r);
	}
	sort (b.begin(), b.end());
	int b1 = b[sz(b) / 2];
	b.clear();
	int b2 = 0;
	if (i != sz(a)) {
		for (;i < sz(a); i++) {
			b.push_back(a[i].l);
			b.push_back(a[i].r);
		}
		sort(b.begin(), b.end());
		b2 = b[sz(b) / 2];
	}
	
 	i = 0;
	for (;i < sz(a) && a[i].mid <= mid; i++) {
		ans += abs(a[i].l - b1);
		ans += abs(a[i].r - b1);
	}
	for (;i < sz(a); i++) {
		ans += abs(a[i].l - b2);
		ans += abs(a[i].r - b2);
	}
	return ans;
}
 
int trinary_search(int l, int r){
	
	if (r - l <= 10) {
		int ans(LLONG_MAX);
		for (int i(l); i <= r; i++)
			ans = min(ans, score(a[i].mid));
		return ans;
	}
	int mid1 = a[l + (r - l) / 3].mid;
	int mid2 = a[l + 2 * (r - l) / 3].mid;
	
	if (score(mid1) <= score(mid2))
		return trinary_search(l, l + 2 * (r - l) / 3);
	return trinary_search(l + (r - l) / 3, r);
}
signed main(){
	int K, N; cin >> K >> N;
	
	int ans(0);
	for (int i(0); i < N; i++) {
		char riv1, riv2;
		int pos1, pos2;
		cin >> riv1 >> pos1 >> riv2 >> pos2;
		
		if (pos2 < pos1) swap(pos1, pos2);
		if (riv1 != riv2) {
			ans++;
			a.push_back ({pos1, pos2, (long double)( (pos1 + pos2) / 2)});
		}
		else ans += pos2 - pos1;
	}
	if (sz(a) == 0){
		 cout << ans << '\n';
		 return 0;
	 }
	sort (a.begin(), a.end(), [](traj &A, traj &B){return A.mid < B.mid;});
	
	if (K == 1) cout << ans + score(LLONG_MAX) << '\n';
	else cout << ans + trinary_search(0, sz(a) - 1) << '\n';
		
	return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 348 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 520 KB Output is correct
6 Correct 1 ms 344 KB Output is correct
7 Correct 2 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 448 KB Output is correct
11 Correct 1 ms 348 KB Output is correct

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 1 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 344 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 1 ms 348 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 1 ms 512 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 512 KB Output is correct
12 Correct 48 ms 7904 KB Output is correct
13 Correct 96 ms 9652 KB Output is correct
14 Correct 61 ms 7864 KB Output is correct
15 Correct 54 ms 5568 KB Output is correct
16 Correct 61 ms 8632 KB Output is correct
17 Correct 75 ms 10172 KB Output is correct
18 Correct 77 ms 9292 KB Output is correct
19 Correct 83 ms 9332 KB Output is correct
20 Correct 72 ms 8984 KB Output is correct
21 Correct 76 ms 9144 KB Output is correct

Subtask #3
0 / 9.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 0 ms 344 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 1 ms 348 KB Output is correct
7 Correct 0 ms 432 KB Output is correct
8 Correct 0 ms 432 KB Output is correct
9 Correct 1 ms 344 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Incorrect 1 ms 600 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB Output is correct
2 Correct 1 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 1 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 1 ms 344 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Incorrect 1 ms 436 KB Output isn't correct
13 Halted 0 ms 0 KB -

Subtask #5
0 / 37.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 600 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 1 ms 348 KB Output is correct
5 Correct 0 ms 344 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 436 KB Output is correct
8 Correct 1 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 1 ms 348 KB Output is correct
12 Incorrect 1 ms 348 KB Output isn't correct
13 Halted 0 ms 0 KB -