oj.uz

Submission #20653

# Submission time Handle Problem Language Result Execution time Memory
20653 2017-02-13T07:50:13 Z model_code None (KOI16_laser) C++11
100 / 100
 79 ms 63152 KB 
#include <stdio.h>
#include <stdlib.h>
#include <algorithm>
#include <vector>
#include <cassert>
using namespace std;

struct point {
point() {
x = y = t = 0;
}
point(long long x_, long long y_, int t_) {
x = x_; y = y_; t = t_;
}
long long x, y;
int t;
bool operator <(const point &t) const {
return x * t.y > y * t.x;
}
point operator -(point &a) {
return point(x - a.x, y - a.y, t);
}
}P[3020];
int R[1020][2];

int ccw(point &a, point &b, point &c)
{
long long p = a.x * (b.y - c.y) + b.x * (c.y - a.y) + c.x * (a.y - b.y);
if (p > 0) return 1;
if (p < 0) return -1;
return 0;
}

int ccw(int i, int j, int k)
{
return ccw(P[i], P[j], P[k]);
}

void match(vector<int> &p)
{
if (p.empty()) return;
vector<point> u;
for (int i = 0; i < p.size(); i++) {
u.push_back(P[p[i]]);
u.back().t = p[i];
}
for (int i = 1; i < u.size(); i++) {
if (u[0].y > u[i].y || (u[0].y == u[i].y && u[0].x > u[i].x)) {
swap(u[0], u[i]);
}
}
for (int i = (int)u.size() - 1; i >= 0; i--) u[i] = u[i] - u[0];
sort(u.begin() + 1, u.end());

int s = -1, f = u[0].t;
u.erase(u.begin());

if (P[f].t) s = f;
else if (P[u[0].t].t) s = u[0].t;
else if (P[u.back().t].t) s = u.back().t;

if (s != -1) {
if (s != f) {
u.clear();
for (int i = 0; i < p.size(); i++) if (p[i] != s) {
u.push_back(P[p[i]] - P[s]);
u.back().t = p[i];
}

sort(u.begin(), u.end());
}

int b = 0, obj = -1;
vector<int> g;
for (int j = 0; j < u.size(); j++) {
b += P[u[j].t].t ? +2 : -1;

if (b == obj) {
R[s][-obj - 1] = u[j].t;
match(g);
g.clear();
obj--;
if (obj < -2) obj = -2000000;
}
else {
g.push_back(u[j].t);
}
}
match(g);
return;
}

for (int k = 0; k < 2; k++) {
int b = 0;
vector<int> g;
for (int j = 0; j < u.size(); j++) {
b += P[u[j].t].t ? +2 : -1;
g.push_back(u[j].t);

if (b == 0) {
match(g);
g.clear();
for (int i = j + 1; i < u.size(); i++) g.push_back(u[i].t);
g.push_back(f);
match(g);
return;
}
}
reverse(u.begin(), u.end());
}
}

int main()
{
int N; scanf("%d", &N);

vector<int> pt;
for (int i = 0; i < N * 3; i++) {
scanf("%lld %lld", &P[i].x, &P[i].y);
P[i].t = i < N;
pt.push_back(i);
}

match(pt);

for (int i = 0; i < N; i++) printf("%d %d\n", R[i][0] - N + 1, R[i][1] - N + 1);

return 0;
}

Compilation message

laser.cpp: In function 'void match(std::vector<int>&)':
laser.cpp:43:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 for (int i = 0; i < p.size(); i++) {
                   ^
laser.cpp:47:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 for (int i = 1; i < u.size(); i++) {
                   ^
laser.cpp:65:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 for (int i = 0; i < p.size(); i++) if (p[i] != s) {
                   ^
laser.cpp:75:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 for (int j = 0; j < u.size(); j++) {
                   ^
laser.cpp:96:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 for (int j = 0; j < u.size(); j++) {
                   ^
laser.cpp:103:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
 for (int i = j + 1; i < u.size(); i++) g.push_back(u[i].t);
                       ^
laser.cpp: In function 'int main()':
laser.cpp:115:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 int N; scanf("%d", &N);
                       ^
laser.cpp:119:37: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf("%lld %lld", &P[i].x, &P[i].y);
                                     ^

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 1252 KB Output is correct
2 Correct 0 ms 1252 KB Output is correct
3 Correct 0 ms 1252 KB Output is correct
4 Correct 0 ms 1252 KB Output is correct
5 Correct 0 ms 1252 KB Output is correct
6 Correct 0 ms 1252 KB Output is correct
7 Correct 0 ms 1252 KB Output is correct
8 Correct 0 ms 1252 KB Output is correct
9 Correct 0 ms 1252 KB Output is correct
10 Correct 0 ms 1252 KB Output is correct
11 Correct 0 ms 1252 KB Output is correct
12 Correct 0 ms 1252 KB Output is correct
13 Correct 0 ms 1252 KB Output is correct
14 Correct 0 ms 1252 KB Output is correct
15 Correct 0 ms 1252 KB Output is correct
16 Correct 0 ms 1252 KB Output is correct
17 Correct 0 ms 1252 KB Output is correct
18 Correct 0 ms 1252 KB Output is correct
19 Correct 0 ms 1252 KB Output is correct
20 Correct 0 ms 1252 KB Output is correct
21 Correct 0 ms 1252 KB Output is correct
22 Correct 0 ms 1252 KB Output is correct
23 Correct 0 ms 1252 KB Output is correct
24 Correct 0 ms 1252 KB Output is correct

Subtask #2
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 1520 KB Output is correct
2 Correct 0 ms 1384 KB Output is correct
3 Correct 0 ms 1388 KB Output is correct
4 Correct 0 ms 1388 KB Output is correct
5 Correct 0 ms 1384 KB Output is correct
6 Correct 0 ms 1388 KB Output is correct
7 Correct 0 ms 1252 KB Output is correct
8 Correct 0 ms 1392 KB Output is correct
9 Correct 0 ms 1388 KB Output is correct
10 Correct 0 ms 1384 KB Output is correct
11 Correct 0 ms 1924 KB Output is correct
12 Correct 0 ms 1488 KB Output is correct
13 Correct 0 ms 1516 KB Output is correct
14 Correct 0 ms 1924 KB Output is correct

Subtask #3
33.0 / 33.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 1252 KB Output is correct
2 Correct 0 ms 1252 KB Output is correct
3 Correct 0 ms 1252 KB Output is correct
4 Correct 0 ms 1252 KB Output is correct
5 Correct 0 ms 1252 KB Output is correct
6 Correct 0 ms 1252 KB Output is correct
7 Correct 0 ms 1252 KB Output is correct
8 Correct 0 ms 1252 KB Output is correct
9 Correct 0 ms 1252 KB Output is correct
10 Correct 0 ms 1252 KB Output is correct
11 Correct 0 ms 1252 KB Output is correct
12 Correct 0 ms 1252 KB Output is correct
13 Correct 0 ms 1252 KB Output is correct
14 Correct 0 ms 1252 KB Output is correct
15 Correct 0 ms 1252 KB Output is correct
16 Correct 0 ms 1252 KB Output is correct
17 Correct 0 ms 1252 KB Output is correct
18 Correct 0 ms 1252 KB Output is correct
19 Correct 0 ms 1252 KB Output is correct
20 Correct 0 ms 1252 KB Output is correct
21 Correct 0 ms 1252 KB Output is correct
22 Correct 0 ms 1252 KB Output is correct
23 Correct 0 ms 1252 KB Output is correct
24 Correct 0 ms 1252 KB Output is correct
25 Correct 0 ms 1520 KB Output is correct
26 Correct 0 ms 1384 KB Output is correct
27 Correct 0 ms 1388 KB Output is correct
28 Correct 0 ms 1388 KB Output is correct
29 Correct 0 ms 1384 KB Output is correct
30 Correct 0 ms 1388 KB Output is correct
31 Correct 0 ms 1252 KB Output is correct
32 Correct 0 ms 1392 KB Output is correct
33 Correct 0 ms 1388 KB Output is correct
34 Correct 0 ms 1384 KB Output is correct
35 Correct 0 ms 1924 KB Output is correct
36 Correct 0 ms 1488 KB Output is correct
37 Correct 0 ms 1516 KB Output is correct
38 Correct 0 ms 1924 KB Output is correct
39 Correct 0 ms 1384 KB Output is correct
40 Correct 0 ms 1384 KB Output is correct
41 Correct 0 ms 1384 KB Output is correct
42 Correct 0 ms 1384 KB Output is correct
43 Correct 0 ms 1384 KB Output is correct
44 Correct 0 ms 1384 KB Output is correct
45 Correct 0 ms 1392 KB Output is correct
46 Correct 0 ms 1384 KB Output is correct
47 Correct 0 ms 1516 KB Output is correct
48 Correct 0 ms 1384 KB Output is correct
49 Correct 0 ms 1620 KB Output is correct
50 Correct 0 ms 1488 KB Output is correct
51 Correct 0 ms 1780 KB Output is correct
52 Correct 0 ms 1780 KB Output is correct
53 Correct 0 ms 1924 KB Output is correct
54 Correct 0 ms 1924 KB Output is correct
55 Correct 0 ms 1924 KB Output is correct
56 Correct 0 ms 1924 KB Output is correct
57 Correct 0 ms 1252 KB Output is correct
58 Correct 0 ms 1384 KB Output is correct
59 Correct 0 ms 1392 KB Output is correct
60 Correct 0 ms 1384 KB Output is correct
61 Correct 0 ms 1384 KB Output is correct
62 Correct 0 ms 1384 KB Output is correct
63 Correct 0 ms 1384 KB Output is correct
64 Correct 0 ms 1516 KB Output is correct
65 Correct 0 ms 1384 KB Output is correct
66 Correct 0 ms 1384 KB Output is correct
67 Correct 0 ms 1384 KB Output is correct
68 Correct 0 ms 1392 KB Output is correct

Subtask #4
34.0 / 34.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 1252 KB Output is correct
2 Correct 0 ms 1252 KB Output is correct
3 Correct 0 ms 1252 KB Output is correct
4 Correct 0 ms 1252 KB Output is correct
5 Correct 0 ms 1252 KB Output is correct
6 Correct 0 ms 1252 KB Output is correct
7 Correct 0 ms 1252 KB Output is correct
8 Correct 0 ms 1252 KB Output is correct
9 Correct 0 ms 1252 KB Output is correct
10 Correct 0 ms 1252 KB Output is correct
11 Correct 0 ms 1252 KB Output is correct
12 Correct 0 ms 1252 KB Output is correct
13 Correct 0 ms 1252 KB Output is correct
14 Correct 0 ms 1252 KB Output is correct
15 Correct 0 ms 1252 KB Output is correct
16 Correct 0 ms 1252 KB Output is correct
17 Correct 0 ms 1252 KB Output is correct
18 Correct 0 ms 1252 KB Output is correct
19 Correct 0 ms 1252 KB Output is correct
20 Correct 0 ms 1252 KB Output is correct
21 Correct 0 ms 1252 KB Output is correct
22 Correct 0 ms 1252 KB Output is correct
23 Correct 0 ms 1252 KB Output is correct
24 Correct 0 ms 1252 KB Output is correct
25 Correct 0 ms 1520 KB Output is correct
26 Correct 0 ms 1384 KB Output is correct
27 Correct 0 ms 1388 KB Output is correct
28 Correct 0 ms 1388 KB Output is correct
29 Correct 0 ms 1384 KB Output is correct
30 Correct 0 ms 1388 KB Output is correct
31 Correct 0 ms 1252 KB Output is correct
32 Correct 0 ms 1392 KB Output is correct
33 Correct 0 ms 1388 KB Output is correct
34 Correct 0 ms 1384 KB Output is correct
35 Correct 0 ms 1924 KB Output is correct
36 Correct 0 ms 1488 KB Output is correct
37 Correct 0 ms 1516 KB Output is correct
38 Correct 0 ms 1924 KB Output is correct
39 Correct 0 ms 1384 KB Output is correct
40 Correct 0 ms 1384 KB Output is correct
41 Correct 0 ms 1384 KB Output is correct
42 Correct 0 ms 1384 KB Output is correct
43 Correct 0 ms 1384 KB Output is correct
44 Correct 0 ms 1384 KB Output is correct
45 Correct 0 ms 1392 KB Output is correct
46 Correct 0 ms 1384 KB Output is correct
47 Correct 0 ms 1516 KB Output is correct
48 Correct 0 ms 1384 KB Output is correct
49 Correct 0 ms 1620 KB Output is correct
50 Correct 0 ms 1488 KB Output is correct
51 Correct 0 ms 1780 KB Output is correct
52 Correct 0 ms 1780 KB Output is correct
53 Correct 0 ms 1924 KB Output is correct
54 Correct 0 ms 1924 KB Output is correct
55 Correct 0 ms 1924 KB Output is correct
56 Correct 0 ms 1924 KB Output is correct
57 Correct 0 ms 1252 KB Output is correct
58 Correct 0 ms 1384 KB Output is correct
59 Correct 0 ms 1392 KB Output is correct
60 Correct 0 ms 1384 KB Output is correct
61 Correct 0 ms 1384 KB Output is correct
62 Correct 0 ms 1384 KB Output is correct
63 Correct 0 ms 1384 KB Output is correct
64 Correct 0 ms 1516 KB Output is correct
65 Correct 0 ms 1384 KB Output is correct
66 Correct 0 ms 1384 KB Output is correct
67 Correct 0 ms 1384 KB Output is correct
68 Correct 0 ms 1392 KB Output is correct
69 Correct 13 ms 4324 KB Output is correct
70 Correct 13 ms 3376 KB Output is correct
71 Correct 26 ms 9104 KB Output is correct
72 Correct 13 ms 4096 KB Output is correct
73 Correct 6 ms 3384 KB Output is correct
74 Correct 13 ms 6224 KB Output is correct
75 Correct 16 ms 5296 KB Output is correct
76 Correct 19 ms 7280 KB Output is correct
77 Correct 16 ms 4600 KB Output is correct
78 Correct 13 ms 3712 KB Output is correct
79 Correct 79 ms 43684 KB Output is correct
80 Correct 66 ms 39140 KB Output is correct
81 Correct 66 ms 42580 KB Output is correct
82 Correct 59 ms 28876 KB Output is correct
83 Correct 63 ms 63152 KB Output is correct
84 Correct 66 ms 63148 KB Output is correct
85 Correct 79 ms 63152 KB Output is correct
86 Correct 66 ms 63152 KB Output is correct
87 Correct 6 ms 4168 KB Output is correct
88 Correct 6 ms 5320 KB Output is correct
89 Correct 39 ms 14924 KB Output is correct
90 Correct 3 ms 2392 KB Output is correct
91 Correct 13 ms 4984 KB Output is correct
92 Correct 13 ms 3352 KB Output is correct
93 Correct 13 ms 3940 KB Output is correct
94 Correct 9 ms 4168 KB Output is correct
95 Correct 19 ms 9800 KB Output is correct
96 Correct 13 ms 4252 KB Output is correct
97 Correct 19 ms 5596 KB Output is correct
98 Correct 19 ms 6232 KB Output is correct