oj.uz

Submission #246583

# Submission time Handle Problem Language Result Execution time Memory
246583 2020-07-09T16:01:46 Z vanic Relay (COI16_relay) C++14
37 / 100
 2000 ms 3312 KB 
#include <iostream>
#include <cstdio>
#include <algorithm>
#include <math.h>
#include <vector>
#include <bitset>

using namespace std;
typedef long long ll;
const int maxn=1e5+5;

int n, m;
vector < pair < int, int > > brod;
vector < pair < int, int > > otok;
bitset < maxn > bio;
bitset < maxn > prvo;

ll ccw(pair < ll, ll > a, pair < ll, ll > b, pair < ll, ll > c){
	return a.first*(b.second-c.second)+b.first*(c.second-a.second)+c.first*(a.second-b.second);
}

bool sijece(pair < int, int > a, pair < int, int > b, pair < int, int > c, pair < int, int > d){
	ll a1, b1, c1, d1;
	a1=ccw(a, b, c);
	b1=ccw(a, b, d);
	c1=ccw(c, d, a);
	d1=ccw(c, d, b);
	if(((a1>0 && b1<0) || (a1<0 && b1>0)) && ((c1>0 && d1<0) || (c1<0 && d1>0))){
		return 1;
	}
	return 0;
}

void rijesi(int x){
	pair < int, int > l, d;
	bool p=0;
	ll y;
	for(int i=0; i<m; i++){
		y=ccw(otok[i], otok[(i+1)%m], brod[x]);
//		cout << y << " ";
		if(y<=0){
			if(!p){
				l=otok[i];
				p=1;
			}
		}
		else{
			if(p){
				d=otok[i];
				p=0;
			}
		}
	}
	if(p && ccw(otok[0], otok[1], brod[x])>0){
		d=otok[0];
	}
/*	cout << endl;
	cout << l.first << " " << l.second << '\n';
	cout << d.first << " " << d.second << '\n';*/
//	cout << "sijece\n";
	for(int i=0; i<n; i++){
		if(!bio[i] && !sijece(l, d, brod[x], brod[i])){
			bio[i]=1;
//			cout << brod[i].first << " " << brod[i].second << '\n';
		}
	}
//	cout << '\n';
}

int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	cin >> n;
	int a, b;
	for(int i=0; i<n; i++){
		cin >> a >> b;
		brod.push_back({a, b});
	}
	cin >> m;
	for(int i=0; i<m; i++){
		cin >> a >> b;
		otok.push_back({a, b});
	}
	bio[0]=1;
	rijesi(0);
	prvo=bio;
	for(int i=1; i<n; i++){
		if(prvo[i]){
			rijesi(i);
		}
	}
	cout << bio.count()-1 << '\n';
	return 0;
}

Subtask #1
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct

Subtask #2
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 25 ms 512 KB Output is correct
12 Correct 28 ms 512 KB Output is correct
13 Correct 18 ms 512 KB Output is correct
14 Correct 36 ms 512 KB Output is correct
15 Correct 19 ms 512 KB Output is correct
16 Correct 26 ms 512 KB Output is correct
17 Correct 19 ms 512 KB Output is correct
18 Correct 19 ms 512 KB Output is correct
19 Correct 8 ms 512 KB Output is correct
20 Correct 7 ms 512 KB Output is correct

Subtask #3
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Execution timed out 2082 ms 3312 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #4
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 5 ms 384 KB Output is correct
9 Correct 5 ms 384 KB Output is correct
10 Correct 5 ms 384 KB Output is correct
11 Correct 25 ms 512 KB Output is correct
12 Correct 28 ms 512 KB Output is correct
13 Correct 18 ms 512 KB Output is correct
14 Correct 36 ms 512 KB Output is correct
15 Correct 19 ms 512 KB Output is correct
16 Correct 26 ms 512 KB Output is correct
17 Correct 19 ms 512 KB Output is correct
18 Correct 19 ms 512 KB Output is correct
19 Correct 8 ms 512 KB Output is correct
20 Correct 7 ms 512 KB Output is correct
21 Execution timed out 2082 ms 3312 KB Time limit exceeded
22 Halted 0 ms 0 KB -