oj.uz

답안 #79218

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
79218 2018-10-11T18:26:21 Z qkxwsm Triangles (CEOI18_tri) C++14
100 / 100
 1638 ms 68812 KB 
/*
    _____
  .'     '.
 /  0   0  \
|     ^     |
|  \     /  |
 \  '---'  /
  '._____.'
*/
#pragma GCC optimize ("O3")
#pragma GCC target ("sse4")
#include "trilib.h"
#include <bits/stdc++.h>
#include <ext/pb_ds/tree_policy.hpp>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/rope>

using namespace std;
using namespace __gnu_pbds;
using namespace __gnu_cxx;

template<typename T> using ordered_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
random_device(rd);
mt19937 rng(rd());

template<class T>
void readi(T &x)
{
	T input = 0;
	bool negative = false;
	char c = ' ';
	while (c < '-')
	{
		c = getchar();
	}
	if (c == '-')
	{
		negative = true;
		c = getchar();
	}
	while (c >= '0')
	{
		input = input * 10 + (c - '0');
		c = getchar();
	}
	if (negative)
	{
		input = -input;
	}
	x = input;
}
template<class T>
void printi(T output)
{
	if (output == 0)
	{
		putchar('0');
		return;
	}
	if (output < 0)
	{
		putchar('-');
		output = -output;
	}
	int aout[20];
	int ilen = 0;
	while(output)
	{
		aout[ilen] = ((output % 10));
		output /= 10;
		ilen++;
	}
	for (int i = ilen - 1; i >= 0; i--)
	{
		putchar(aout[i] + '0');
	}
	return;
}
template<class T>
void ckmin(T &a, T b)
{
	a = min(a, b);
}
template<class T>
void ckmax(T &a, T b)
{
	a = max(a, b);
}
long long expo(long long a, long long e, long long mod)
{
	return ((e == 0) ? 1 : ((expo(a * a % mod, e >> 1, mod)) * ((e & 1) ? a : 1) % mod));
}
template<class T, class U>
T nmod(T &x, U mod)
{
	if (x >= mod) x -= mod;
}
template<class T>
T gcd(T a, T b)
{
	return (b ? gcd(b, a % b) : a);
}
template<class T>
T randomize(T mod)
{
	return (uniform_int_distribution<T>(0, mod - 1))(rng);
}

#define y0 ___y0
#define y1 ___y1
#define MP make_pair
#define MT make_tuple
#define PB push_back
#define PF push_front
#define LB lower_bound
#define UB upper_bound
#define fi first
#define se second
#define debug(x) cerr << #x << " = " << x << endl;
#define sz(x) ((int) (x.size()))

const long double PI = 4.0 * atan(1.0);
const long double EPS = 1e-9;

#define MAGIC 347
#define SINF 10007
#define CO 1000007
#define INF 1000000007
#define BIG 1000000931
#define LARGE 1696969696967ll
#define GIANT 2564008813937411ll
#define LLINF 2696969696969696969ll
#define MAXN 40013

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<ld, ld> pdd;

int N, Q;
rope<int> hull;
int ans;
map<int, bool> mp[MAXN];

bool ccw(int u, int v, int w)
{
	int x = u, y = v, z = w;
	if (v < u && v < w)
	{
		u = y; v = z; w = x;
	}
	else if (w < u && w < v)
	{
		u = z; v = x; w = y;
	}
	if (mp[u].find(v * N + w) != mp[u].end())
	{
		return mp[u][v * N + w];
	}
	Q++;
	if (Q == 1000001) exit(0);
	bool res = !(is_clockwise(u + 1, v + 1, w + 1));
	mp[u][v * N + w] = res; mp[u][w * N + v] = !res;
	return res;
}
int fetch(int idx)
{
	int S = sz(hull);
	return hull[(idx + S) % S];
}
void debug_hull()
{
	cerr << "hull has:";
	for (int x : hull)
	{
		cerr << ' ' << x;
	}
	cerr << endl;
}
void ins2(int i)
{
	assert(sz(hull) == 2);
	int u = hull[0], v = hull[1];
	hull.erase(0, sz(hull));
	if (ccw(u, v, i))
	{
		hull.PB(u); hull.PB(v); hull.PB(i);
	}
	else
	{
		hull.PB(u); hull.PB(i); hull.PB(v);
	}
}

int32_t main()
{
	ios_base::sync_with_stdio(0);
	// cout << fixed << setprecision(10);
	// cerr << fixed << setprecision(10);
	// freopen ("file.in", "r", stdin);
	// freopen ("file.out", "w", stdout);
	N = get_n();
	for (int i = 0; i < N; i++)
	{
		if (sz(hull) <= 1)
		{
			hull.PB(i);
			continue;
		}
		if (sz(hull) == 2)
		{
			ins2(i);
			continue;
		}
		int lo = 0, hi = sz(hull) - 1;
		while(hi > lo)
		{
			int mid = (lo + hi + 1) / 2, idx = fetch(mid);
			if (ccw(fetch(0), idx, i))
			{
				lo = mid;
			}
			else
			{
				hi = mid - 1;
			}
		}
		int idx = lo;
		while(true)
		{
			if (sz(hull) <= 2)
			{
				break;
			}
			if (!ccw(fetch(idx - 1), fetch(idx), i))
			{
				hull.erase(idx, 1);
				idx--;
				if (idx < 0) idx += sz(hull);
			}
			else if (!ccw(i, fetch(idx + 1), fetch(idx + 2)))
			{
				hull.erase((idx + 1 + sz(hull)) % sz(hull), 1);
			}
			else
			{
				break;
			}
		}
		if (sz(hull) == 2)
		{
			ins2(i);
		}
		else if (ccw(fetch(idx), i, fetch(idx + 1)))
		{
			hull.insert(idx + 1, i);
		}
	}
	ans = sz(hull);
	give_answer(ans);
	// cerr << "time elapsed = " << (clock() / (CLOCKS_PER_SEC / 1000)) << " ms" << endl;
	return 0;
}

Subtask #1
15.0 / 15.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2296 KB Output is correct
2 Correct 3 ms 2416 KB Output is correct
3 Correct 3 ms 2476 KB Output is correct
4 Correct 4 ms 2476 KB Output is correct
5 Correct 3 ms 2476 KB Output is correct
6 Correct 4 ms 2496 KB Output is correct
7 Correct 4 ms 2496 KB Output is correct
8 Correct 4 ms 2496 KB Output is correct
9 Correct 4 ms 2620 KB Output is correct
10 Correct 4 ms 2620 KB Output is correct
11 Correct 4 ms 2620 KB Output is correct
12 Correct 4 ms 2620 KB Output is correct
13 Correct 3 ms 2620 KB Output is correct
14 Correct 4 ms 2620 KB Output is correct
15 Correct 4 ms 2620 KB Output is correct
16 Correct 3 ms 2620 KB Output is correct
17 Correct 4 ms 2620 KB Output is correct
18 Correct 3 ms 2620 KB Output is correct
19 Correct 4 ms 2620 KB Output is correct
20 Correct 4 ms 2620 KB Output is correct
21 Correct 4 ms 2620 KB Output is correct
22 Correct 4 ms 2620 KB Output is correct
23 Correct 4 ms 2620 KB Output is correct
24 Correct 4 ms 2620 KB Output is correct
25 Correct 4 ms 2620 KB Output is correct
26 Correct 4 ms 2620 KB Output is correct

Subtask #2
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2296 KB Output is correct
2 Correct 3 ms 2416 KB Output is correct
3 Correct 3 ms 2476 KB Output is correct
4 Correct 4 ms 2476 KB Output is correct
5 Correct 3 ms 2476 KB Output is correct
6 Correct 4 ms 2496 KB Output is correct
7 Correct 4 ms 2496 KB Output is correct
8 Correct 4 ms 2496 KB Output is correct
9 Correct 4 ms 2620 KB Output is correct
10 Correct 4 ms 2620 KB Output is correct
11 Correct 4 ms 2620 KB Output is correct
12 Correct 4 ms 2620 KB Output is correct
13 Correct 3 ms 2620 KB Output is correct
14 Correct 4 ms 2620 KB Output is correct
15 Correct 4 ms 2620 KB Output is correct
16 Correct 3 ms 2620 KB Output is correct
17 Correct 4 ms 2620 KB Output is correct
18 Correct 3 ms 2620 KB Output is correct
19 Correct 4 ms 2620 KB Output is correct
20 Correct 4 ms 2620 KB Output is correct
21 Correct 4 ms 2620 KB Output is correct
22 Correct 4 ms 2620 KB Output is correct
23 Correct 4 ms 2620 KB Output is correct
24 Correct 4 ms 2620 KB Output is correct
25 Correct 4 ms 2620 KB Output is correct
26 Correct 4 ms 2620 KB Output is correct
27 Correct 4 ms 2620 KB Output is correct
28 Correct 3 ms 2620 KB Output is correct
29 Correct 3 ms 2620 KB Output is correct
30 Correct 3 ms 2620 KB Output is correct
31 Correct 4 ms 2620 KB Output is correct
32 Correct 5 ms 2812 KB Output is correct
33 Correct 5 ms 2812 KB Output is correct
34 Correct 5 ms 2812 KB Output is correct
35 Correct 5 ms 2812 KB Output is correct
36 Correct 8 ms 3020 KB Output is correct
37 Correct 8 ms 3028 KB Output is correct
38 Correct 8 ms 3028 KB Output is correct
39 Correct 8 ms 3028 KB Output is correct
40 Correct 5 ms 3028 KB Output is correct
41 Correct 5 ms 3028 KB Output is correct
42 Correct 5 ms 3028 KB Output is correct
43 Correct 5 ms 3028 KB Output is correct
44 Correct 6 ms 3028 KB Output is correct
45 Correct 7 ms 3028 KB Output is correct
46 Correct 5 ms 3028 KB Output is correct
47 Correct 5 ms 3028 KB Output is correct
48 Correct 5 ms 3028 KB Output is correct
49 Correct 5 ms 3028 KB Output is correct
50 Correct 5 ms 3028 KB Output is correct
51 Correct 6 ms 3028 KB Output is correct
52 Correct 6 ms 3028 KB Output is correct

Subtask #3
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2296 KB Output is correct
2 Correct 3 ms 2416 KB Output is correct
3 Correct 3 ms 2476 KB Output is correct
4 Correct 4 ms 2476 KB Output is correct
5 Correct 3 ms 2476 KB Output is correct
6 Correct 4 ms 2496 KB Output is correct
7 Correct 4 ms 2496 KB Output is correct
8 Correct 4 ms 2496 KB Output is correct
9 Correct 4 ms 2620 KB Output is correct
10 Correct 4 ms 2620 KB Output is correct
11 Correct 4 ms 2620 KB Output is correct
12 Correct 4 ms 2620 KB Output is correct
13 Correct 3 ms 2620 KB Output is correct
14 Correct 4 ms 2620 KB Output is correct
15 Correct 4 ms 2620 KB Output is correct
16 Correct 3 ms 2620 KB Output is correct
17 Correct 4 ms 2620 KB Output is correct
18 Correct 3 ms 2620 KB Output is correct
19 Correct 4 ms 2620 KB Output is correct
20 Correct 4 ms 2620 KB Output is correct
21 Correct 4 ms 2620 KB Output is correct
22 Correct 4 ms 2620 KB Output is correct
23 Correct 4 ms 2620 KB Output is correct
24 Correct 4 ms 2620 KB Output is correct
25 Correct 4 ms 2620 KB Output is correct
26 Correct 4 ms 2620 KB Output is correct
27 Correct 4 ms 2620 KB Output is correct
28 Correct 3 ms 2620 KB Output is correct
29 Correct 3 ms 2620 KB Output is correct
30 Correct 3 ms 2620 KB Output is correct
31 Correct 4 ms 2620 KB Output is correct
32 Correct 5 ms 2812 KB Output is correct
33 Correct 5 ms 2812 KB Output is correct
34 Correct 5 ms 2812 KB Output is correct
35 Correct 5 ms 2812 KB Output is correct
36 Correct 8 ms 3020 KB Output is correct
37 Correct 8 ms 3028 KB Output is correct
38 Correct 8 ms 3028 KB Output is correct
39 Correct 8 ms 3028 KB Output is correct
40 Correct 5 ms 3028 KB Output is correct
41 Correct 5 ms 3028 KB Output is correct
42 Correct 5 ms 3028 KB Output is correct
43 Correct 5 ms 3028 KB Output is correct
44 Correct 6 ms 3028 KB Output is correct
45 Correct 7 ms 3028 KB Output is correct
46 Correct 5 ms 3028 KB Output is correct
47 Correct 5 ms 3028 KB Output is correct
48 Correct 5 ms 3028 KB Output is correct
49 Correct 5 ms 3028 KB Output is correct
50 Correct 5 ms 3028 KB Output is correct
51 Correct 6 ms 3028 KB Output is correct
52 Correct 6 ms 3028 KB Output is correct
53 Correct 3 ms 3028 KB Output is correct
54 Correct 3 ms 3028 KB Output is correct
55 Correct 3 ms 3028 KB Output is correct
56 Correct 3 ms 3028 KB Output is correct
57 Correct 3 ms 3028 KB Output is correct
58 Correct 79 ms 12972 KB Output is correct
59 Correct 89 ms 13608 KB Output is correct
60 Correct 85 ms 13608 KB Output is correct
61 Correct 88 ms 13608 KB Output is correct
62 Correct 425 ms 25340 KB Output is correct
63 Correct 412 ms 25340 KB Output is correct
64 Correct 428 ms 25344 KB Output is correct
65 Correct 436 ms 25344 KB Output is correct
66 Correct 57 ms 25344 KB Output is correct
67 Correct 79 ms 25344 KB Output is correct
68 Correct 97 ms 25344 KB Output is correct
69 Correct 136 ms 25344 KB Output is correct
70 Correct 178 ms 25344 KB Output is correct
71 Correct 260 ms 25344 KB Output is correct
72 Correct 60 ms 25344 KB Output is correct
73 Correct 60 ms 25344 KB Output is correct
74 Correct 60 ms 25344 KB Output is correct
75 Correct 62 ms 25344 KB Output is correct
76 Correct 109 ms 25344 KB Output is correct
77 Correct 230 ms 25344 KB Output is correct
78 Correct 200 ms 25344 KB Output is correct

Subtask #4
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 25344 KB Output is correct
2 Correct 3 ms 25344 KB Output is correct
3 Correct 3 ms 25344 KB Output is correct
4 Correct 3 ms 25344 KB Output is correct
5 Correct 4 ms 25344 KB Output is correct
6 Correct 3 ms 25344 KB Output is correct
7 Correct 4 ms 25344 KB Output is correct
8 Correct 3 ms 25344 KB Output is correct
9 Correct 3 ms 25344 KB Output is correct
10 Correct 3 ms 25344 KB Output is correct
11 Correct 3 ms 25344 KB Output is correct
12 Correct 5 ms 25344 KB Output is correct
13 Correct 3 ms 25344 KB Output is correct
14 Correct 3 ms 25344 KB Output is correct
15 Correct 3 ms 25344 KB Output is correct
16 Correct 4 ms 25344 KB Output is correct
17 Correct 4 ms 25344 KB Output is correct
18 Correct 3 ms 25344 KB Output is correct
19 Correct 4 ms 25344 KB Output is correct
20 Correct 3 ms 25344 KB Output is correct
21 Correct 3 ms 25344 KB Output is correct
22 Correct 3 ms 25344 KB Output is correct
23 Correct 3 ms 25344 KB Output is correct
24 Correct 3 ms 25344 KB Output is correct
25 Correct 4 ms 25344 KB Output is correct
26 Correct 5 ms 25344 KB Output is correct

Subtask #5
25.0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 2296 KB Output is correct
2 Correct 3 ms 2416 KB Output is correct
3 Correct 3 ms 2476 KB Output is correct
4 Correct 4 ms 2476 KB Output is correct
5 Correct 3 ms 2476 KB Output is correct
6 Correct 4 ms 2496 KB Output is correct
7 Correct 4 ms 2496 KB Output is correct
8 Correct 4 ms 2496 KB Output is correct
9 Correct 4 ms 2620 KB Output is correct
10 Correct 4 ms 2620 KB Output is correct
11 Correct 4 ms 2620 KB Output is correct
12 Correct 4 ms 2620 KB Output is correct
13 Correct 3 ms 2620 KB Output is correct
14 Correct 4 ms 2620 KB Output is correct
15 Correct 4 ms 2620 KB Output is correct
16 Correct 3 ms 2620 KB Output is correct
17 Correct 4 ms 2620 KB Output is correct
18 Correct 3 ms 2620 KB Output is correct
19 Correct 4 ms 2620 KB Output is correct
20 Correct 4 ms 2620 KB Output is correct
21 Correct 4 ms 2620 KB Output is correct
22 Correct 4 ms 2620 KB Output is correct
23 Correct 4 ms 2620 KB Output is correct
24 Correct 4 ms 2620 KB Output is correct
25 Correct 4 ms 2620 KB Output is correct
26 Correct 4 ms 2620 KB Output is correct
27 Correct 4 ms 2620 KB Output is correct
28 Correct 3 ms 2620 KB Output is correct
29 Correct 3 ms 2620 KB Output is correct
30 Correct 3 ms 2620 KB Output is correct
31 Correct 4 ms 2620 KB Output is correct
32 Correct 5 ms 2812 KB Output is correct
33 Correct 5 ms 2812 KB Output is correct
34 Correct 5 ms 2812 KB Output is correct
35 Correct 5 ms 2812 KB Output is correct
36 Correct 8 ms 3020 KB Output is correct
37 Correct 8 ms 3028 KB Output is correct
38 Correct 8 ms 3028 KB Output is correct
39 Correct 8 ms 3028 KB Output is correct
40 Correct 5 ms 3028 KB Output is correct
41 Correct 5 ms 3028 KB Output is correct
42 Correct 5 ms 3028 KB Output is correct
43 Correct 5 ms 3028 KB Output is correct
44 Correct 6 ms 3028 KB Output is correct
45 Correct 7 ms 3028 KB Output is correct
46 Correct 5 ms 3028 KB Output is correct
47 Correct 5 ms 3028 KB Output is correct
48 Correct 5 ms 3028 KB Output is correct
49 Correct 5 ms 3028 KB Output is correct
50 Correct 5 ms 3028 KB Output is correct
51 Correct 6 ms 3028 KB Output is correct
52 Correct 6 ms 3028 KB Output is correct
53 Correct 3 ms 3028 KB Output is correct
54 Correct 3 ms 3028 KB Output is correct
55 Correct 3 ms 3028 KB Output is correct
56 Correct 3 ms 3028 KB Output is correct
57 Correct 3 ms 3028 KB Output is correct
58 Correct 79 ms 12972 KB Output is correct
59 Correct 89 ms 13608 KB Output is correct
60 Correct 85 ms 13608 KB Output is correct
61 Correct 88 ms 13608 KB Output is correct
62 Correct 425 ms 25340 KB Output is correct
63 Correct 412 ms 25340 KB Output is correct
64 Correct 428 ms 25344 KB Output is correct
65 Correct 436 ms 25344 KB Output is correct
66 Correct 57 ms 25344 KB Output is correct
67 Correct 79 ms 25344 KB Output is correct
68 Correct 97 ms 25344 KB Output is correct
69 Correct 136 ms 25344 KB Output is correct
70 Correct 178 ms 25344 KB Output is correct
71 Correct 260 ms 25344 KB Output is correct
72 Correct 60 ms 25344 KB Output is correct
73 Correct 60 ms 25344 KB Output is correct
74 Correct 60 ms 25344 KB Output is correct
75 Correct 62 ms 25344 KB Output is correct
76 Correct 109 ms 25344 KB Output is correct
77 Correct 230 ms 25344 KB Output is correct
78 Correct 200 ms 25344 KB Output is correct
79 Correct 3 ms 25344 KB Output is correct
80 Correct 3 ms 25344 KB Output is correct
81 Correct 3 ms 25344 KB Output is correct
82 Correct 3 ms 25344 KB Output is correct
83 Correct 4 ms 25344 KB Output is correct
84 Correct 3 ms 25344 KB Output is correct
85 Correct 4 ms 25344 KB Output is correct
86 Correct 3 ms 25344 KB Output is correct
87 Correct 3 ms 25344 KB Output is correct
88 Correct 3 ms 25344 KB Output is correct
89 Correct 3 ms 25344 KB Output is correct
90 Correct 5 ms 25344 KB Output is correct
91 Correct 3 ms 25344 KB Output is correct
92 Correct 3 ms 25344 KB Output is correct
93 Correct 3 ms 25344 KB Output is correct
94 Correct 4 ms 25344 KB Output is correct
95 Correct 4 ms 25344 KB Output is correct
96 Correct 3 ms 25344 KB Output is correct
97 Correct 4 ms 25344 KB Output is correct
98 Correct 3 ms 25344 KB Output is correct
99 Correct 3 ms 25344 KB Output is correct
100 Correct 3 ms 25344 KB Output is correct
101 Correct 3 ms 25344 KB Output is correct
102 Correct 3 ms 25344 KB Output is correct
103 Correct 4 ms 25344 KB Output is correct
104 Correct 5 ms 25344 KB Output is correct
105 Correct 4 ms 25344 KB Output is correct
106 Correct 4 ms 25344 KB Output is correct
107 Correct 3 ms 25344 KB Output is correct
108 Correct 4 ms 25344 KB Output is correct
109 Correct 3 ms 25344 KB Output is correct
110 Correct 279 ms 32168 KB Output is correct
111 Correct 284 ms 32168 KB Output is correct
112 Correct 264 ms 32168 KB Output is correct
113 Correct 272 ms 32168 KB Output is correct
114 Correct 1557 ms 68732 KB Output is correct
115 Correct 1614 ms 68812 KB Output is correct
116 Correct 1638 ms 68812 KB Output is correct
117 Correct 1551 ms 68812 KB Output is correct
118 Correct 182 ms 68812 KB Output is correct
119 Correct 172 ms 68812 KB Output is correct
120 Correct 310 ms 68812 KB Output is correct
121 Correct 448 ms 68812 KB Output is correct
122 Correct 649 ms 68812 KB Output is correct
123 Correct 983 ms 68812 KB Output is correct
124 Correct 172 ms 68812 KB Output is correct
125 Correct 231 ms 68812 KB Output is correct
126 Correct 238 ms 68812 KB Output is correct
127 Correct 234 ms 68812 KB Output is correct
128 Correct 238 ms 68812 KB Output is correct
129 Correct 775 ms 68812 KB Output is correct
130 Correct 682 ms 68812 KB Output is correct