Submission #1084089

# Submission time Handle Problem Language Result Execution time Memory
1084089 2024-09-05T07:04:06 Z raczek Portal (BOI24_portal) C++17
100 / 100
317 ms 20648 KB
#include<bits/stdc++.h>
using namespace std;
#ifdef DEBUG
auto&operator <<(auto& o, pair<auto, auto> p) {return o<<"("<<p.first<<", "<<p.second<<")";}
auto operator <<(auto& o, auto x)->decltype(x.end(), o) {o<<"{"; for(auto v : x) o<<v<<", "; return o<<"}";}
#define debug(X) cout<<"["#X"]"<<X<<endl;
#else
#define debug(X) {}
#endif
#define int long long
int sqr(int a) {return a*a;}
struct vec
{
	int x, y;
	int nx = 0, ny = 0;
	int cnt = 0;
	vec(){x=0;y=0;}
	vec(int _x, int _y)
	{
		x = _x; y = _y;
		if(!(x != 0 || y != 0)) nx = 0, ny = 0;
		else nx = x/__gcd(x, y), ny = y/__gcd(x, y);	
		if(nx != 0)
		cnt = x / nx;
		if(ny != 0)
		cnt = y / ny;
	}
	friend bool operator < (const vec& obj1, const vec& obj2)
	{
		if(sqr(obj1.x)+sqr(obj1.y) < sqr(obj2.x)+sqr(obj2.y)) return true;
		if(sqr(obj1.x)+sqr(obj1.y) > sqr(obj2.x)+sqr(obj2.y)) return false;
		return make_pair(obj1.x, obj1.y) < make_pair(obj2.x, obj2.y);
	}
};
int operator *(vec& obj1, vec& obj2)
{
	return obj1.x*obj2.y - obj1.y*obj2.x;
}
auto&operator <<(auto& o, vec V) {return o<<"["<<V.x<<";"<<V.y<<"]";}
vec _gcd(vec a, vec b, pair<int, int> norm)
{
	return vec(__gcd(a.cnt, b.cnt)*norm.first,
	__gcd(a.cnt, b.cnt)*norm.second);
}
int32_t main()
{
	ios_base::sync_with_stdio(false);
	cin.tie(0);
	cout.tie(0);
	int n;
	cin>>n;
	int prevX, prevY;
	map<pair<int, int>, vec> norms;
	set<vec> alive;
	auto add = [&](vec a)
	{
		auto v = norms[make_pair(a.nx, a.ny)];
		if(alive.find(v) != alive.end()) alive.erase(v);
                norms[make_pair(a.nx, a.ny)] = _gcd(a, v, {a.nx, a.ny});
		if(norms[make_pair(a.nx, a.ny)].x != 0 || norms[make_pair(a.nx, a.ny)].y != 0)
		alive.insert(norms[make_pair(a.nx, a.ny)]);
	};
	for(int i=0;i<n;i++)
	{
		int x, y;
		cin>>x>>y;
		if(i != 0) 
			add(vec(-prevX+x, -prevY+y));
		prevX = x;
		prevY = y;
	}srand(1234);while(alive.size() > 2)
	{
		debug(alive);auto it = alive.begin();vector<vec> vc;vc.push_back(*it);it++;vc.push_back(*it);it = alive.end();it--;vc.push_back(*it);random_shuffle(vc.begin(), vc.end());vec a = vc[0];vec b = vc[1];vec c = vc[2];int k = c*b/(a*b);
		int l = a*c/(a*b);
		alive.erase(c);
		debug(alive);
		c.x -= k*a.x;
		c.y -= k*a.y;
		c.x -= l*b.x;
		c.y -= l*b.y;
		vec p = vec(c.x, c.y);
		add(p);	
	}
	if(alive.size() <= 1) {cout<<-1; return 0;}
	auto it = alive.begin();
	auto a = *it; it++;
	auto b = *it;
	cout<<abs(a*b);
}

Compilation message

Main.cpp:39:18: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts'
   39 | auto&operator <<(auto& o, vec V) {return o<<"["<<V.x<<";"<<V.y<<"]";}
      |                  ^~~~
# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 372 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 372 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 344 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 460 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 285 ms 19024 KB Output is correct
3 Correct 299 ms 19140 KB Output is correct
4 Correct 295 ms 18772 KB Output is correct
5 Correct 285 ms 18772 KB Output is correct
6 Correct 280 ms 19276 KB Output is correct
7 Correct 18 ms 1624 KB Output is correct
8 Correct 17 ms 1884 KB Output is correct
9 Correct 15 ms 1716 KB Output is correct
10 Correct 99 ms 9552 KB Output is correct
11 Correct 90 ms 9924 KB Output is correct
12 Correct 94 ms 9784 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 297 ms 20308 KB Output is correct
15 Correct 275 ms 20304 KB Output is correct
16 Correct 306 ms 19536 KB Output is correct
17 Correct 309 ms 20564 KB Output is correct
18 Correct 286 ms 19520 KB Output is correct
19 Correct 299 ms 20048 KB Output is correct
20 Correct 292 ms 19284 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 1 ms 604 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 344 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 0 ms 348 KB Output is correct
10 Correct 0 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 1 ms 344 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 344 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 460 KB Output is correct
20 Correct 1 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 348 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 1 ms 348 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 1 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 1 ms 348 KB Output is correct
29 Correct 1 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 348 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 1 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 1 ms 344 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 344 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 348 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 372 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 344 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 460 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 1 ms 604 KB Output is correct
41 Correct 0 ms 348 KB Output is correct
42 Correct 0 ms 348 KB Output is correct
43 Correct 0 ms 344 KB Output is correct
44 Correct 0 ms 348 KB Output is correct
45 Correct 0 ms 348 KB Output is correct
46 Correct 0 ms 348 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 0 ms 348 KB Output is correct
50 Correct 0 ms 348 KB Output is correct
51 Correct 0 ms 348 KB Output is correct
52 Correct 0 ms 348 KB Output is correct
53 Correct 1 ms 344 KB Output is correct
54 Correct 0 ms 348 KB Output is correct
55 Correct 0 ms 344 KB Output is correct
56 Correct 0 ms 348 KB Output is correct
57 Correct 0 ms 348 KB Output is correct
58 Correct 0 ms 460 KB Output is correct
59 Correct 1 ms 348 KB Output is correct
60 Correct 0 ms 348 KB Output is correct
61 Correct 0 ms 348 KB Output is correct
62 Correct 0 ms 348 KB Output is correct
63 Correct 1 ms 348 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Correct 1 ms 348 KB Output is correct
66 Correct 0 ms 348 KB Output is correct
67 Correct 1 ms 348 KB Output is correct
68 Correct 1 ms 348 KB Output is correct
69 Correct 0 ms 348 KB Output is correct
70 Correct 1 ms 348 KB Output is correct
71 Correct 0 ms 348 KB Output is correct
72 Correct 0 ms 348 KB Output is correct
73 Correct 1 ms 348 KB Output is correct
74 Correct 0 ms 348 KB Output is correct
75 Correct 1 ms 344 KB Output is correct
76 Correct 0 ms 348 KB Output is correct
77 Correct 0 ms 344 KB Output is correct
78 Correct 0 ms 348 KB Output is correct
79 Correct 0 ms 348 KB Output is correct
80 Correct 4 ms 720 KB Output is correct
81 Correct 5 ms 856 KB Output is correct
82 Correct 1 ms 344 KB Output is correct
83 Correct 1 ms 348 KB Output is correct
84 Correct 0 ms 348 KB Output is correct
85 Correct 0 ms 348 KB Output is correct
86 Correct 0 ms 348 KB Output is correct
87 Correct 0 ms 348 KB Output is correct
88 Correct 0 ms 348 KB Output is correct
89 Correct 5 ms 860 KB Output is correct
90 Correct 5 ms 860 KB Output is correct
91 Correct 4 ms 724 KB Output is correct
92 Correct 5 ms 860 KB Output is correct
93 Correct 4 ms 892 KB Output is correct
94 Correct 4 ms 860 KB Output is correct
95 Correct 4 ms 860 KB Output is correct
96 Correct 4 ms 860 KB Output is correct
97 Correct 4 ms 780 KB Output is correct
98 Correct 4 ms 860 KB Output is correct
99 Correct 5 ms 860 KB Output is correct
100 Correct 4 ms 860 KB Output is correct
101 Correct 4 ms 604 KB Output is correct
102 Correct 4 ms 836 KB Output is correct
103 Correct 4 ms 604 KB Output is correct
104 Correct 4 ms 604 KB Output is correct
105 Correct 4 ms 860 KB Output is correct
106 Correct 4 ms 860 KB Output is correct
107 Correct 4 ms 716 KB Output is correct
108 Correct 4 ms 728 KB Output is correct
109 Correct 4 ms 856 KB Output is correct
110 Correct 4 ms 852 KB Output is correct
111 Correct 0 ms 348 KB Output is correct
112 Correct 0 ms 352 KB Output is correct
113 Correct 0 ms 352 KB Output is correct
114 Correct 4 ms 876 KB Output is correct
115 Correct 5 ms 864 KB Output is correct
116 Correct 4 ms 864 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 1 ms 344 KB Output is correct
2 Correct 0 ms 348 KB Output is correct
3 Correct 0 ms 348 KB Output is correct
4 Correct 0 ms 348 KB Output is correct
5 Correct 0 ms 348 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 344 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 1 ms 348 KB Output is correct
11 Correct 0 ms 348 KB Output is correct
12 Correct 0 ms 348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 372 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 348 KB Output is correct
17 Correct 1 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 0 ms 348 KB Output is correct
20 Correct 0 ms 348 KB Output is correct
21 Correct 0 ms 348 KB Output is correct
22 Correct 0 ms 344 KB Output is correct
23 Correct 0 ms 348 KB Output is correct
24 Correct 0 ms 344 KB Output is correct
25 Correct 0 ms 348 KB Output is correct
26 Correct 0 ms 348 KB Output is correct
27 Correct 0 ms 348 KB Output is correct
28 Correct 0 ms 460 KB Output is correct
29 Correct 0 ms 348 KB Output is correct
30 Correct 0 ms 348 KB Output is correct
31 Correct 1 ms 344 KB Output is correct
32 Correct 0 ms 348 KB Output is correct
33 Correct 0 ms 348 KB Output is correct
34 Correct 0 ms 348 KB Output is correct
35 Correct 0 ms 348 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 0 ms 348 KB Output is correct
39 Correct 0 ms 348 KB Output is correct
40 Correct 0 ms 344 KB Output is correct
41 Correct 285 ms 19024 KB Output is correct
42 Correct 299 ms 19140 KB Output is correct
43 Correct 295 ms 18772 KB Output is correct
44 Correct 285 ms 18772 KB Output is correct
45 Correct 280 ms 19276 KB Output is correct
46 Correct 18 ms 1624 KB Output is correct
47 Correct 17 ms 1884 KB Output is correct
48 Correct 15 ms 1716 KB Output is correct
49 Correct 99 ms 9552 KB Output is correct
50 Correct 90 ms 9924 KB Output is correct
51 Correct 94 ms 9784 KB Output is correct
52 Correct 0 ms 348 KB Output is correct
53 Correct 297 ms 20308 KB Output is correct
54 Correct 275 ms 20304 KB Output is correct
55 Correct 306 ms 19536 KB Output is correct
56 Correct 309 ms 20564 KB Output is correct
57 Correct 286 ms 19520 KB Output is correct
58 Correct 299 ms 20048 KB Output is correct
59 Correct 292 ms 19284 KB Output is correct
60 Correct 1 ms 604 KB Output is correct
61 Correct 0 ms 348 KB Output is correct
62 Correct 0 ms 348 KB Output is correct
63 Correct 0 ms 344 KB Output is correct
64 Correct 0 ms 348 KB Output is correct
65 Correct 0 ms 348 KB Output is correct
66 Correct 0 ms 348 KB Output is correct
67 Correct 0 ms 348 KB Output is correct
68 Correct 0 ms 348 KB Output is correct
69 Correct 0 ms 348 KB Output is correct
70 Correct 0 ms 348 KB Output is correct
71 Correct 0 ms 348 KB Output is correct
72 Correct 0 ms 348 KB Output is correct
73 Correct 1 ms 344 KB Output is correct
74 Correct 0 ms 348 KB Output is correct
75 Correct 0 ms 344 KB Output is correct
76 Correct 0 ms 348 KB Output is correct
77 Correct 0 ms 348 KB Output is correct
78 Correct 0 ms 460 KB Output is correct
79 Correct 1 ms 348 KB Output is correct
80 Correct 0 ms 348 KB Output is correct
81 Correct 0 ms 348 KB Output is correct
82 Correct 0 ms 348 KB Output is correct
83 Correct 1 ms 348 KB Output is correct
84 Correct 0 ms 348 KB Output is correct
85 Correct 1 ms 348 KB Output is correct
86 Correct 0 ms 348 KB Output is correct
87 Correct 1 ms 348 KB Output is correct
88 Correct 1 ms 348 KB Output is correct
89 Correct 0 ms 348 KB Output is correct
90 Correct 1 ms 348 KB Output is correct
91 Correct 0 ms 348 KB Output is correct
92 Correct 0 ms 348 KB Output is correct
93 Correct 1 ms 348 KB Output is correct
94 Correct 0 ms 348 KB Output is correct
95 Correct 1 ms 344 KB Output is correct
96 Correct 0 ms 348 KB Output is correct
97 Correct 0 ms 344 KB Output is correct
98 Correct 0 ms 348 KB Output is correct
99 Correct 0 ms 348 KB Output is correct
100 Correct 4 ms 720 KB Output is correct
101 Correct 5 ms 856 KB Output is correct
102 Correct 1 ms 344 KB Output is correct
103 Correct 1 ms 348 KB Output is correct
104 Correct 0 ms 348 KB Output is correct
105 Correct 0 ms 348 KB Output is correct
106 Correct 0 ms 348 KB Output is correct
107 Correct 0 ms 348 KB Output is correct
108 Correct 0 ms 348 KB Output is correct
109 Correct 5 ms 860 KB Output is correct
110 Correct 5 ms 860 KB Output is correct
111 Correct 4 ms 724 KB Output is correct
112 Correct 5 ms 860 KB Output is correct
113 Correct 4 ms 892 KB Output is correct
114 Correct 4 ms 860 KB Output is correct
115 Correct 4 ms 860 KB Output is correct
116 Correct 4 ms 860 KB Output is correct
117 Correct 4 ms 780 KB Output is correct
118 Correct 4 ms 860 KB Output is correct
119 Correct 5 ms 860 KB Output is correct
120 Correct 4 ms 860 KB Output is correct
121 Correct 4 ms 604 KB Output is correct
122 Correct 4 ms 836 KB Output is correct
123 Correct 4 ms 604 KB Output is correct
124 Correct 4 ms 604 KB Output is correct
125 Correct 4 ms 860 KB Output is correct
126 Correct 4 ms 860 KB Output is correct
127 Correct 4 ms 716 KB Output is correct
128 Correct 4 ms 728 KB Output is correct
129 Correct 4 ms 856 KB Output is correct
130 Correct 4 ms 852 KB Output is correct
131 Correct 0 ms 348 KB Output is correct
132 Correct 0 ms 352 KB Output is correct
133 Correct 0 ms 352 KB Output is correct
134 Correct 4 ms 876 KB Output is correct
135 Correct 5 ms 864 KB Output is correct
136 Correct 4 ms 864 KB Output is correct
137 Correct 296 ms 19800 KB Output is correct
138 Correct 302 ms 19804 KB Output is correct
139 Correct 290 ms 19796 KB Output is correct
140 Correct 310 ms 19796 KB Output is correct
141 Correct 292 ms 19732 KB Output is correct
142 Correct 3 ms 344 KB Output is correct
143 Correct 2 ms 344 KB Output is correct
144 Correct 2 ms 540 KB Output is correct
145 Correct 2 ms 568 KB Output is correct
146 Correct 2 ms 348 KB Output is correct
147 Correct 2 ms 348 KB Output is correct
148 Correct 0 ms 348 KB Output is correct
149 Correct 289 ms 20520 KB Output is correct
150 Correct 317 ms 20648 KB Output is correct
151 Correct 293 ms 19604 KB Output is correct
152 Correct 295 ms 19796 KB Output is correct
153 Correct 285 ms 19792 KB Output is correct
154 Correct 299 ms 20052 KB Output is correct
155 Correct 310 ms 19796 KB Output is correct
156 Correct 264 ms 18772 KB Output is correct
157 Correct 268 ms 18768 KB Output is correct
158 Correct 269 ms 19024 KB Output is correct
159 Correct 251 ms 18016 KB Output is correct
160 Correct 266 ms 18692 KB Output is correct
161 Correct 275 ms 18772 KB Output is correct
162 Correct 277 ms 19028 KB Output is correct
163 Correct 272 ms 18144 KB Output is correct
164 Correct 263 ms 17908 KB Output is correct
165 Correct 258 ms 17748 KB Output is correct
166 Correct 244 ms 16980 KB Output is correct
167 Correct 307 ms 18772 KB Output is correct
168 Correct 246 ms 17488 KB Output is correct
169 Correct 232 ms 16144 KB Output is correct
170 Correct 256 ms 17228 KB Output is correct
171 Correct 0 ms 348 KB Output is correct
172 Correct 0 ms 348 KB Output is correct
173 Correct 0 ms 348 KB Output is correct