oj.uz

Submission #404829

# Submission time Handle Problem Language Result Execution time Memory
404829 2021-05-15T05:53:11 Z maomao90 None (KOI16_laser) C++14
100 / 100
 219 ms 48196 KB 
#include <bits/stdc++.h> 
using namespace std;

#define mnto(x, y) x = min(x, (__typeof__(x)) y)
#define mxto(x, y) x = max(x, (__typeof__(x)) y)
#define REP(i, s, e) for (int i = s; i < e; i++)
#define RREP(i, s, e) for (int i = s; i >= e; i--)
typedef long long ll;
typedef long double ld;
#define MP make_pair
#define FI first
#define SE second
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
#define MT make_tuple
typedef tuple<int, int, int> iii;
#define ALL(_a) _a.begin(), _a.end()
#define pb emplace_back
typedef vector<int> vi;
typedef vector<ii> vii;

#define INF 1000000005
#define LINF 1000000000000000005
#define MOD 1000000007
#define MAXN 3005

struct pt {
	ll x, y; int color;
	int id;
	pt() {
		x = 0; y = 0; color = 0; id = 0;
	}
	pt(ll x, ll y): x(x), y(y), color(0), id(0) {}
	pt(ll x, ll y, int color, int id): x(x), y(y), color(color), id(id) {}
	pt operator-(const pt& other) const {
		return pt(x - other.x, y - other.y);
	}
	bool operator==(const pt& r) const {
		return x == r.x && y == r.y && color == r.color && id == r.id;
	}
};
ll cross(pt a, pt b) {
	return a.x * b.y - a.y * b.x;
}
// positive if c is to the right/top of line ab
ll orient(pt a, pt b, pt c) {
	return cross(b - a, c - a);
}

int n;
vector<pt> points;
ii ans[MAXN];

void order(vector<pt>& points) {
	sort(points.begin() + 1, points.end(), [&] (pt l, pt r) {
			// sort clockwise
			return orient(points[0], l, r) < 0;
			});
	//REP (i, 0, points.size()) {
		//printf(" %lld %lld %d\n", points[i].x, points[i].y, points[i].id);
	//}
}

void solve(vector<pt> points);

vector<pt> res[5];
void split1(vector<pt> points, pt lowest) {
	int cnt = 0;
	pt f, s;
	int i = 0;
	REP (j, 0, 5) {
		res[j].clear();
	}
	for (pt point : points) {
		cnt += point.color;
		if (cnt == -1 && i == 0 && point.color == -1) {
			f = point;
			i++;
		} else if (cnt == -2 && i == 1 && point.color == -1) {
			s = point;
			i++;
		} else {
			res[i].pb(point);
		}
	}
	ans[lowest.id] = MP(f.id, s.id);
	vector<pt> tmp[5];
	REP (j, 0, 3) {
		tmp[j] = res[j];
	}
	REP (j, 0, 3) {
		solve(tmp[j]);
	}
}

void split2(vector<pt> points, pt lowest) {
	int i = 0;
	REP (j, 0, 5) {
		res[j].clear();
	}
	int cnt = 0;
	for (pt point : points) {
		cnt += point.color;
		res[i].pb(point);
		if (i == 0 && cnt == 0) {
			i++;
			res[i].pb(lowest);
		} else if (i == 0 && cnt == 1) {
			res[i].pb(lowest);
			i++;
		}
	}
	vector<pt> tmp[5];
	REP (j, 0, 2) {
		tmp[j] = res[j];
	}
	REP (j, 0, 2) {
		solve(tmp[j]);
	}
}

void solve(vector<pt> points) {
	if (points.size() == 0) {
	   	return;
	}
	sort(ALL(points), [&] (pt l, pt r) {
			return l.y < r.y;
			});
	order(points);
	if (points[0].color == 2 || points[1].color == 2 || points.back().color == 2) {
		if (points[1].color == 2) {
			swap(points[1], points[0]);
		} else if (points.back().color == 2) {
			swap(points[points.size() - 1], points[0]);
		}
		order(points);
		int cnt = 0;
		pt f, s;
		int i = 0;
		vector<pt> res[5];
		for (int j = 1; j < points.size(); j++) {
			pt point = points[j];
			cnt += point.color;
			if (cnt == -1 && i == 0 && point.color == -1) {
				f = point;
				i++;
			} else if (cnt == -2 && i == 1 && point.color == -1) {
				s = point;
				i++;
			} else {
				res[i].pb(point);
			}
		}
		ans[points[0].id] = MP(f.id, s.id);
		REP (j, 0, 3) {
			solve(res[j]);
		}
	} else {
		int i = 0;
		int cnt = 0;
		vector<pt> res[5];
		for (int j = 1; j < points.size(); j++) {
			pt point = points[j];
			cnt += point.color;
			res[i].pb(point);
			if (i == 0 && cnt == 0) {
				i++;
				res[i].pb(points[0]);
			} else if (i == 0 && cnt == 1) {
				res[i].pb(points[0]);
				i++;
			}
		}
		REP (j, 0, 2) {
			solve(res[j]);
		}
	}
}

int main() {
	scanf("%d", &n);
	REP (i, 0, n) {
		pt temp;
		scanf("%lld%lld", &temp.x, &temp.y);
		temp.id = i;
		temp.color = 2;
		points.pb(temp);
	}
	REP (i, n, 3 * n) {
		pt temp;
		scanf("%lld%lld", &temp.x, &temp.y);
		temp.id = i;
		temp.color = -1;
		points.pb(temp);
	}
	solve(points);
	REP (i, 0, n) {
		printf("%d %d\n", ans[i].FI - n + 1, ans[i].SE - n + 1);
	}
	return 0;
}

Compilation message

laser.cpp: In function 'void solve(std::vector<pt>)':
laser.cpp:141:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<pt>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  141 |   for (int j = 1; j < points.size(); j++) {
      |                   ~~^~~~~~~~~~~~~~~
laser.cpp:162:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<pt>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  162 |   for (int j = 1; j < points.size(); j++) {
      |                   ~~^~~~~~~~~~~~~~~
laser.cpp: In function 'int main()':
laser.cpp:181:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  181 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
laser.cpp:184:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  184 |   scanf("%lld%lld", &temp.x, &temp.y);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
laser.cpp:191:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  191 |   scanf("%lld%lld", &temp.x, &temp.y);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 1 ms 236 KB Output is correct

Subtask #2
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 460 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 460 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 2 ms 460 KB Output is correct
9 Correct 2 ms 460 KB Output is correct
10 Correct 1 ms 332 KB Output is correct
11 Correct 4 ms 1100 KB Output is correct
12 Correct 2 ms 460 KB Output is correct
13 Correct 2 ms 736 KB Output is correct
14 Correct 3 ms 1100 KB Output is correct

Subtask #3
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 1 ms 236 KB Output is correct
25 Correct 2 ms 460 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 460 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 460 KB Output is correct
30 Correct 1 ms 332 KB Output is correct
31 Correct 1 ms 332 KB Output is correct
32 Correct 2 ms 460 KB Output is correct
33 Correct 2 ms 460 KB Output is correct
34 Correct 1 ms 332 KB Output is correct
35 Correct 4 ms 1100 KB Output is correct
36 Correct 2 ms 460 KB Output is correct
37 Correct 2 ms 736 KB Output is correct
38 Correct 3 ms 1100 KB Output is correct
39 Correct 2 ms 460 KB Output is correct
40 Correct 2 ms 588 KB Output is correct
41 Correct 2 ms 332 KB Output is correct
42 Correct 1 ms 332 KB Output is correct
43 Correct 2 ms 460 KB Output is correct
44 Correct 2 ms 460 KB Output is correct
45 Correct 2 ms 460 KB Output is correct
46 Correct 2 ms 460 KB Output is correct
47 Correct 1 ms 332 KB Output is correct
48 Correct 2 ms 460 KB Output is correct
49 Correct 2 ms 716 KB Output is correct
50 Correct 2 ms 588 KB Output is correct
51 Correct 4 ms 844 KB Output is correct
52 Correct 3 ms 716 KB Output is correct
53 Correct 2 ms 716 KB Output is correct
54 Correct 3 ms 716 KB Output is correct
55 Correct 2 ms 716 KB Output is correct
56 Correct 2 ms 716 KB Output is correct
57 Correct 1 ms 332 KB Output is correct
58 Correct 1 ms 332 KB Output is correct
59 Correct 2 ms 460 KB Output is correct
60 Correct 1 ms 332 KB Output is correct
61 Correct 1 ms 332 KB Output is correct
62 Correct 1 ms 460 KB Output is correct
63 Correct 1 ms 332 KB Output is correct
64 Correct 2 ms 460 KB Output is correct
65 Correct 2 ms 460 KB Output is correct
66 Correct 2 ms 460 KB Output is correct
67 Correct 2 ms 588 KB Output is correct
68 Correct 2 ms 460 KB Output is correct

Subtask #4
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 204 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 1 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 1 ms 204 KB Output is correct
21 Correct 1 ms 204 KB Output is correct
22 Correct 1 ms 204 KB Output is correct
23 Correct 1 ms 204 KB Output is correct
24 Correct 1 ms 236 KB Output is correct
25 Correct 2 ms 460 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 460 KB Output is correct
28 Correct 1 ms 332 KB Output is correct
29 Correct 1 ms 460 KB Output is correct
30 Correct 1 ms 332 KB Output is correct
31 Correct 1 ms 332 KB Output is correct
32 Correct 2 ms 460 KB Output is correct
33 Correct 2 ms 460 KB Output is correct
34 Correct 1 ms 332 KB Output is correct
35 Correct 4 ms 1100 KB Output is correct
36 Correct 2 ms 460 KB Output is correct
37 Correct 2 ms 736 KB Output is correct
38 Correct 3 ms 1100 KB Output is correct
39 Correct 2 ms 460 KB Output is correct
40 Correct 2 ms 588 KB Output is correct
41 Correct 2 ms 332 KB Output is correct
42 Correct 1 ms 332 KB Output is correct
43 Correct 2 ms 460 KB Output is correct
44 Correct 2 ms 460 KB Output is correct
45 Correct 2 ms 460 KB Output is correct
46 Correct 2 ms 460 KB Output is correct
47 Correct 1 ms 332 KB Output is correct
48 Correct 2 ms 460 KB Output is correct
49 Correct 2 ms 716 KB Output is correct
50 Correct 2 ms 588 KB Output is correct
51 Correct 4 ms 844 KB Output is correct
52 Correct 3 ms 716 KB Output is correct
53 Correct 2 ms 716 KB Output is correct
54 Correct 3 ms 716 KB Output is correct
55 Correct 2 ms 716 KB Output is correct
56 Correct 2 ms 716 KB Output is correct
57 Correct 1 ms 332 KB Output is correct
58 Correct 1 ms 332 KB Output is correct
59 Correct 2 ms 460 KB Output is correct
60 Correct 1 ms 332 KB Output is correct
61 Correct 1 ms 332 KB Output is correct
62 Correct 1 ms 460 KB Output is correct
63 Correct 1 ms 332 KB Output is correct
64 Correct 2 ms 460 KB Output is correct
65 Correct 2 ms 460 KB Output is correct
66 Correct 2 ms 460 KB Output is correct
67 Correct 2 ms 588 KB Output is correct
68 Correct 2 ms 460 KB Output is correct
69 Correct 50 ms 10568 KB Output is correct
70 Correct 31 ms 6904 KB Output is correct
71 Correct 55 ms 11444 KB Output is correct
72 Correct 31 ms 7032 KB Output is correct
73 Correct 24 ms 5068 KB Output is correct
74 Correct 21 ms 3788 KB Output is correct
75 Correct 41 ms 7704 KB Output is correct
76 Correct 41 ms 8260 KB Output is correct
77 Correct 23 ms 4364 KB Output is correct
78 Correct 29 ms 5828 KB Output is correct
79 Correct 219 ms 48196 KB Output is correct
80 Correct 213 ms 46144 KB Output is correct
81 Correct 219 ms 47556 KB Output is correct
82 Correct 160 ms 37296 KB Output is correct
83 Correct 170 ms 37428 KB Output is correct
84 Correct 168 ms 37540 KB Output is correct
85 Correct 170 ms 37452 KB Output is correct
86 Correct 168 ms 37408 KB Output is correct
87 Correct 38 ms 7736 KB Output is correct
88 Correct 38 ms 7368 KB Output is correct
89 Correct 61 ms 16708 KB Output is correct
90 Correct 17 ms 3020 KB Output is correct
91 Correct 28 ms 5552 KB Output is correct
92 Correct 27 ms 5100 KB Output is correct
93 Correct 20 ms 3728 KB Output is correct
94 Correct 33 ms 7748 KB Output is correct
95 Correct 23 ms 4404 KB Output is correct
96 Correct 20 ms 3692 KB Output is correct
97 Correct 23 ms 3916 KB Output is correct
98 Correct 20 ms 3532 KB Output is correct