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답안 #670955

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
670955 2022-12-11T13:47:35 Z Dan4Life Palembang Bridges (APIO15_bridge) C++17
22 / 100
 128 ms 9764 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long
#define fi first
#define se second
#define pb push_back
using pii = pair<int,int>;
#define all(a) a.begin(),a.end()
#define sz(a) (int)a.size()
const int maxn = (int)1e5+10;
const int LINF = (int)1e18;
vector<int> v;
vector<pii> seg;
set<pii> bef,dur,aft;
int t, n, sum_bef, sum_dur, sum_aft, tot, ans=LINF;

int tryy(set<pii> &S, int bri, int t){
	if(S.empty()) return 0;
	vector<int> v; v.clear();
	int ans = LINF;
	for(auto u : S) v.pb(seg[u.se].fi), v.pb(seg[u.se].se);
	sort(all(v));
	int tot = (int)v.size();
	int med = v[tot/2];
	for(int i = tot/2-1; i < tot/2+1; i++){
		if(i<0 or i>=tot) continue;
		int med = v[i], sum=0;
		for(auto u : S){
			int x = seg[u.se].fi, y = seg[u.se].se;
			sum+=min(abs(med-x)+abs(med-y),abs(bri-x)+abs(bri-y))+1;
		}
		ans = min(ans, sum);
	}
	return ans;
}

int32_t main() {
	ios_base::sync_with_stdio(false); cin.tie(0);
	cin >> t >> n;
	for(int i = 0; i < n; i++){
		char a, c; int b, d;
		cin >> a >> b >> c >> d;
		if(a==c) tot+=abs(b-d);
		else seg.pb({b,d}), v.pb(b), v.pb(d);
	}
	sort(all(v)); sort(all(seg));
	v.erase(unique(all(v)), v.end());
	for(int i = 0; i < sz(seg); i++) 
		aft.insert({min(seg[i].fi, seg[i].se),i}), sum_aft+=seg[i].fi+seg[i].se+1;
	for(auto u : v){
		while(!aft.empty() and aft.begin()->fi<=u){
			int i = aft.begin()->se;
			dur.insert({max(seg[i].fi, seg[i].se), i}); 
			sum_dur+=abs(seg[i].se-seg[i].fi)+1;
			sum_aft-=seg[i].fi+seg[i].se+1;
			aft.erase(aft.begin());
		}

		while(!dur.empty() and dur.begin()->fi<u){
			int i = dur.begin()->se;
			bef.insert({max(seg[i].fi, seg[i].se), i}); 
			sum_bef+=seg[i].se+seg[i].fi+1;
			sum_dur-=abs(seg[i].se-seg[i].fi)-1;
			dur.erase(dur.begin());
		}
		ans = min(ans, (sz(bef)-sz(aft))*2*u-sum_bef+sum_dur+sum_aft);
		if(t==2){
			ans = min(ans, tryy(bef,u,0)+sum_dur+sum_aft-sz(aft)*2*u);
			ans = min(ans, sz(bef)*2*u-sum_bef+sum_dur+tryy(aft,u,1));
		}
	}
	if(seg.empty()) ans=0;
	cout << ans+tot;
}

Compilation message

bridge.cpp: In function 'long long int tryy(std::set<std::pair<long long int, long long int> >&, long long int, long long int)':
bridge.cpp:25:6: warning: unused variable 'med' [-Wunused-variable]
   25 |  int med = v[tot/2];
      |      ^~~

Subtask #1
8.0 / 8.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct

Subtask #2
14.0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 340 KB Output is correct
4 Correct 1 ms 340 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 340 KB Output is correct
10 Correct 1 ms 340 KB Output is correct
11 Correct 1 ms 340 KB Output is correct
12 Correct 65 ms 9636 KB Output is correct
13 Correct 128 ms 9604 KB Output is correct
14 Correct 105 ms 8728 KB Output is correct
15 Correct 63 ms 5816 KB Output is correct
16 Correct 69 ms 9764 KB Output is correct
17 Correct 77 ms 9676 KB Output is correct
18 Correct 81 ms 9716 KB Output is correct
19 Correct 89 ms 9716 KB Output is correct
20 Correct 79 ms 9592 KB Output is correct
21 Correct 87 ms 9636 KB Output is correct

Subtask #3
0 / 9.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Incorrect 1 ms 212 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #4
0 / 32.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Incorrect 1 ms 340 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
0 / 37.0

# 결과 실행 시간 메모리 Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 0 ms 212 KB Output is correct
4 Incorrect 2 ms 212 KB Output isn't correct
5 Halted 0 ms 0 KB -