oj.uz

Submission #404813

# Submission time Handle Problem Language Result Execution time Memory
404813 2021-05-15T05:00:37 Z maomao90 None (KOI16_laser) C++14
66 / 100
 161 ms 65540 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; bool blue;
	int id;
	pt() {
		x = 0; y = 0; blue = 0; id = 0;
	}
	pt(ll x, ll y): x(x), y(y), blue(0), id(0) {}
	pt(ll x, ll y, bool blue, int id): x(x), y(y), blue(blue), 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 && blue == r.blue && 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, pt lowest) {
	points.erase(find(ALL(points), lowest));
	sort(ALL(points), [&] (pt l, pt r) {
			// sort clockwise
			return orient(lowest, l, r) < 0;
			});
	//printf("%lld %lld %d\n", lowest.x, lowest.y, lowest.id);
	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[3];
void split1(vector<pt> points, pt lowest) {
	int cnt = 0;
	pt f, s;
	int i = 0;
	REP (j, 0, 3) {
		res[j].clear();
	}
	for (pt point : points) {
		if (point.blue) {
			cnt -= 2;
		} else {
			cnt++;
		}
		if (cnt == 1 && i == 0 && !point.blue) {
			f = point;
			i++;
		} else if (cnt == 2 && i == 1 && !point.blue) {
			s = point;
			i++;
		} else {
			res[i].pb(point);
		}
	}
	ans[lowest.id] = MP(f.id, s.id);
	vector<pt> tmp[3];
	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, 3) {
		res[j].clear();
	}
	int cnt = 0;
	for (pt point : points) {
		if (point.blue) {
			cnt -= 2;
		} else {
			cnt++;
		}
		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[2];
	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;
	}
	pt lowest;
	lowest.y = INF;
	REP (i, 0, points.size()) {
		if (points[i].y < lowest.y) {
			lowest = points[i];
		}
	}
	order(points, lowest);
	if (lowest.blue) {
		split1(points, lowest);
	} else if (points[0].blue) {
		points.pb(lowest);
		lowest = points[0];
		order(points, lowest);
		split1(points, lowest);
	} else if (points.back().blue) {
		pt tmp = points.back();
		points.pb(lowest);
		lowest = tmp;
		order(points, lowest);
		split1(points, lowest);
	} else {
		split2(points, lowest);
	}
}

int main() {
	scanf("%d", &n);
	REP (i, 0, n) {
		pt temp;
		scanf("%lld%lld", &temp.x, &temp.y);
		temp.id = i;
		temp.blue = 1;
		points.pb(temp);
	}
	REP (i, n, 3 * n) {
		pt temp;
		scanf("%lld%lld", &temp.x, &temp.y);
		temp.id = i;
		temp.blue = 0;
		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 order(std::vector<pt>&, pt)':
laser.cpp:6:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<pt>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 | #define REP(i, s, e) for (int i = s; i < e; i++)
......
   61 |  REP (i, 0, points.size()) {
      |       ~~~~~~~~~~~~~~~~~~~               
laser.cpp:61:2: note: in expansion of macro 'REP'
   61 |  REP (i, 0, points.size()) {
      |  ^~~
laser.cpp: In function 'void solve(std::vector<pt>)':
laser.cpp:6:40: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<pt>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 | #define REP(i, s, e) for (int i = s; i < e; i++)
......
  138 |  REP (i, 0, points.size()) {
      |       ~~~~~~~~~~~~~~~~~~~               
laser.cpp:138:2: note: in expansion of macro 'REP'
  138 |  REP (i, 0, points.size()) {
      |  ^~~
laser.cpp: In function 'int main()':
laser.cpp:163:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  163 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
laser.cpp:166:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  166 |   scanf("%lld%lld", &temp.x, &temp.y);
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
laser.cpp:173:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
  173 |   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 300 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 300 KB Output is correct
24 Correct 1 ms 204 KB Output is correct

Subtask #2
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 640 KB Output is correct
2 Correct 1 ms 420 KB Output is correct
3 Correct 1 ms 588 KB Output is correct
4 Correct 1 ms 428 KB Output is correct
5 Correct 1 ms 588 KB Output is correct
6 Correct 1 ms 460 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 2 ms 588 KB Output is correct
9 Correct 1 ms 460 KB Output is correct
10 Correct 1 ms 460 KB Output is correct
11 Correct 3 ms 1356 KB Output is correct
12 Correct 1 ms 716 KB Output is correct
13 Correct 3 ms 844 KB Output is correct
14 Correct 3 ms 1356 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 300 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 300 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 2 ms 640 KB Output is correct
26 Correct 1 ms 420 KB Output is correct
27 Correct 1 ms 588 KB Output is correct
28 Correct 1 ms 428 KB Output is correct
29 Correct 1 ms 588 KB Output is correct
30 Correct 1 ms 460 KB Output is correct
31 Correct 1 ms 332 KB Output is correct
32 Correct 2 ms 588 KB Output is correct
33 Correct 1 ms 460 KB Output is correct
34 Correct 1 ms 460 KB Output is correct
35 Correct 3 ms 1356 KB Output is correct
36 Correct 1 ms 716 KB Output is correct
37 Correct 3 ms 844 KB Output is correct
38 Correct 3 ms 1356 KB Output is correct
39 Correct 2 ms 716 KB Output is correct
40 Correct 2 ms 684 KB Output is correct
41 Correct 1 ms 460 KB Output is correct
42 Correct 1 ms 460 KB Output is correct
43 Correct 2 ms 556 KB Output is correct
44 Correct 2 ms 552 KB Output is correct
45 Correct 2 ms 588 KB Output is correct
46 Correct 2 ms 588 KB Output is correct
47 Correct 1 ms 424 KB Output is correct
48 Correct 2 ms 556 KB Output is correct
49 Correct 2 ms 844 KB Output is correct
50 Correct 2 ms 684 KB Output is correct
51 Correct 2 ms 1228 KB Output is correct
52 Correct 2 ms 1320 KB Output is correct
53 Correct 2 ms 1356 KB Output is correct
54 Correct 3 ms 1356 KB Output is correct
55 Correct 2 ms 1320 KB Output is correct
56 Correct 2 ms 1316 KB Output is correct
57 Correct 1 ms 332 KB Output is correct
58 Correct 1 ms 460 KB Output is correct
59 Correct 1 ms 428 KB Output is correct
60 Correct 1 ms 332 KB Output is correct
61 Correct 2 ms 460 KB Output is correct
62 Correct 1 ms 428 KB Output is correct
63 Correct 1 ms 428 KB Output is correct
64 Correct 1 ms 588 KB Output is correct
65 Correct 2 ms 460 KB Output is correct
66 Correct 2 ms 588 KB Output is correct
67 Correct 2 ms 588 KB Output is correct
68 Correct 1 ms 588 KB Output is correct

Subtask #4
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 300 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 300 KB Output is correct
24 Correct 1 ms 204 KB Output is correct
25 Correct 2 ms 640 KB Output is correct
26 Correct 1 ms 420 KB Output is correct
27 Correct 1 ms 588 KB Output is correct
28 Correct 1 ms 428 KB Output is correct
29 Correct 1 ms 588 KB Output is correct
30 Correct 1 ms 460 KB Output is correct
31 Correct 1 ms 332 KB Output is correct
32 Correct 2 ms 588 KB Output is correct
33 Correct 1 ms 460 KB Output is correct
34 Correct 1 ms 460 KB Output is correct
35 Correct 3 ms 1356 KB Output is correct
36 Correct 1 ms 716 KB Output is correct
37 Correct 3 ms 844 KB Output is correct
38 Correct 3 ms 1356 KB Output is correct
39 Correct 2 ms 716 KB Output is correct
40 Correct 2 ms 684 KB Output is correct
41 Correct 1 ms 460 KB Output is correct
42 Correct 1 ms 460 KB Output is correct
43 Correct 2 ms 556 KB Output is correct
44 Correct 2 ms 552 KB Output is correct
45 Correct 2 ms 588 KB Output is correct
46 Correct 2 ms 588 KB Output is correct
47 Correct 1 ms 424 KB Output is correct
48 Correct 2 ms 556 KB Output is correct
49 Correct 2 ms 844 KB Output is correct
50 Correct 2 ms 684 KB Output is correct
51 Correct 2 ms 1228 KB Output is correct
52 Correct 2 ms 1320 KB Output is correct
53 Correct 2 ms 1356 KB Output is correct
54 Correct 3 ms 1356 KB Output is correct
55 Correct 2 ms 1320 KB Output is correct
56 Correct 2 ms 1316 KB Output is correct
57 Correct 1 ms 332 KB Output is correct
58 Correct 1 ms 460 KB Output is correct
59 Correct 1 ms 428 KB Output is correct
60 Correct 1 ms 332 KB Output is correct
61 Correct 2 ms 460 KB Output is correct
62 Correct 1 ms 428 KB Output is correct
63 Correct 1 ms 428 KB Output is correct
64 Correct 1 ms 588 KB Output is correct
65 Correct 2 ms 460 KB Output is correct
66 Correct 2 ms 588 KB Output is correct
67 Correct 2 ms 588 KB Output is correct
68 Correct 1 ms 588 KB Output is correct
69 Correct 30 ms 15432 KB Output is correct
70 Correct 20 ms 10060 KB Output is correct
71 Correct 34 ms 15692 KB Output is correct
72 Correct 21 ms 9280 KB Output is correct
73 Correct 17 ms 8264 KB Output is correct
74 Correct 23 ms 10680 KB Output is correct
75 Correct 27 ms 10728 KB Output is correct
76 Correct 29 ms 11844 KB Output is correct
77 Correct 19 ms 6380 KB Output is correct
78 Correct 20 ms 8960 KB Output is correct
79 Runtime error 161 ms 65540 KB Execution killed with signal 9
80 Halted 0 ms 0 KB -