Submission #528612

# Submission time Handle Problem Language Result Execution time Memory
528612 2022-02-20T18:46:39 Z LucaDantas Alternating Current (BOI18_alternating) C++17
100 / 100
40 ms 5632 KB
#include <bits/stdc++.h>
using namespace std;

constexpr int maxn = 3e5+10;

int pref[maxn];
int mx = 0, ini_mx = 0, n, m;

struct Wire {
	int l, r, id;
	int sz() const { return r >= l ? r - l + 1 : r + (n - l + 1); }
	bool operator<(const Wire& o) const {
		if(l == o.l) return this->sz() > o.sz();
		return l < o.l;
	}
	bool inside(const Wire& o) const {
		int st = (l - o.l + n) % n;
		return st + this->sz() <= o.sz();
	}
} wr[maxn];

int pai[maxn];

int main() {
	scanf("%d %d", &n, &m);
	for(int i = 0; i < m; i++) {
		scanf("%d %d", &wr[i].l, &wr[i].r); wr[i].id = i;
		if(wr[i].l <= wr[i].r) {
			pref[wr[i].l]++;
			pref[wr[i].r+1]--;
		} else {
			pref[wr[i].l]++;
			pref[1]++;
			pref[wr[i].r+1]--;
		}
	}

	for(int i = 1; i <= n; i++) {
		pref[i] += pref[i-1];
		pref[i+n] = pref[i];
		if(pref[i] < 2) return puts("impossible"), 0;
	}

	sort(wr, wr+m);

	int virou = 0;
	int fim = 0, aberto = -1;

	vector<Wire> brabos;

	memset(pai, -1, sizeof pai);
	Wire last = wr[0];
	for(int rep = 0; rep < 2; rep++) {
		for(int i = !rep; i < m; i++) {
			if(wr[i].inside(last) && wr[i].id != last.id) {
				if(rep) pai[wr[i].id] = last.id;
			} else {
				if(rep) brabos.push_back(wr[i]);
				last = wr[i];
			}
		}
	}

	/* puts("BRABOS: ");
	printf("Size: %ld\n", brabos.size());
	for(Wire x : brabos)
		printf("(%d %d %d) ", x.l, x.r, x.id);
	puts(""); */

	vector<int> ans(m);

	auto print = [&]() {
		for(int i = 0; i < m; i++)
			printf("%d", ans[i]);
		puts("");
		exit(0);
	};

	if(brabos[0].sz() == n) {
		ans[brabos[0].id] = 1;
		print();
	}

	if(brabos.size() % 2 == 0) {
		for(int i = 0; i < brabos.size(); i++)
			ans[brabos[i].id] = i&1;
		
		for(int i = 0; i < m; i++)
			if(pai[i] != -1) ans[i] = 1^ans[pai[i]];

		print();
	}

	sort(brabos.begin(), brabos.end(), [](const Wire& a, const Wire& b) { return a.l < b.l; });

	for(int i = 0; i < brabos.size(); i++) {
		auto nxt = [&](int x) { return (x+1) % brabos.size(); };
		auto eu = brabos[i], prox = brabos[nxt(i)];
		int l = prox.l, r = eu.r;
		
		if(r < l) r += n;

		bool tem = 1;
		for(int j = l; j <= r; j++)
			tem &= pref[j] >= 3;

		auto no_intersection = [](Wire a, Wire b) {
			if(a.r < a.l) a.r += n;
			if(b.r < b.l) b.r += n;

			if(a.r < b.l) return 1;
			return 0;
		};
		if(tem || no_intersection(eu, prox)) {
			// printf("BOM %d | %d %d\n", i, l, r);

			bool opa = 0;
			ans[ brabos[i].id ] = opa;

			for(int j = nxt(i); j != i; j = nxt(j)) {
				// printf("to %d %d\n", j, opa);
				ans[ brabos[j].id ] = opa;
				opa ^= 1;
			}

			for(int i = 0; i < m; i++)
				if(pai[i] != -1) ans[i] = 1^ans[pai[i]];
				// else printf("sai corno %d\n", i);

			print();
		}
	}

	puts("impossible");
}

Compilation message

alternating.cpp: In function 'int main()':
alternating.cpp:85:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Wire>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |   for(int i = 0; i < brabos.size(); i++)
      |                  ~~^~~~~~~~~~~~~~~
alternating.cpp:96:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<Wire>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   96 |  for(int i = 0; i < brabos.size(); i++) {
      |                 ~~^~~~~~~~~~~~~~~
alternating.cpp:46:6: warning: unused variable 'virou' [-Wunused-variable]
   46 |  int virou = 0;
      |      ^~~~~
alternating.cpp:47:6: warning: unused variable 'fim' [-Wunused-variable]
   47 |  int fim = 0, aberto = -1;
      |      ^~~
alternating.cpp:47:15: warning: unused variable 'aberto' [-Wunused-variable]
   47 |  int fim = 0, aberto = -1;
      |               ^~~~~~
alternating.cpp:25:7: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |  scanf("%d %d", &n, &m);
      |  ~~~~~^~~~~~~~~~~~~~~~~
alternating.cpp:27:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |   scanf("%d %d", &wr[i].l, &wr[i].r); wr[i].id = i;
      |   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
# Verdict Execution time Memory Grader output
1 Correct 1 ms 1356 KB Output is correct
2 Correct 1 ms 1448 KB Output is correct
3 Correct 1 ms 1484 KB Output is correct
4 Correct 1 ms 1484 KB Output is correct
5 Correct 1 ms 1356 KB Output is correct
6 Correct 1 ms 1452 KB Output is correct
7 Correct 1 ms 1356 KB Output is correct
8 Correct 0 ms 304 KB Output is correct
9 Correct 1 ms 1484 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 1356 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 1484 KB Output is correct
15 Correct 1 ms 1484 KB Output is correct
16 Correct 1 ms 1452 KB Output is correct
17 Correct 1 ms 1356 KB Output is correct
18 Correct 1 ms 1444 KB Output is correct
19 Correct 1 ms 1484 KB Output is correct
20 Correct 1 ms 1484 KB Output is correct
21 Correct 1 ms 1356 KB Output is correct
22 Correct 1 ms 1484 KB Output is correct
23 Correct 1 ms 1484 KB Output is correct
24 Correct 1 ms 1484 KB Output is correct
25 Correct 1 ms 1448 KB Output is correct
26 Correct 1 ms 1484 KB Output is correct
27 Correct 0 ms 204 KB Output is correct
28 Correct 1 ms 1484 KB Output is correct
29 Correct 1 ms 296 KB Output is correct
30 Correct 0 ms 204 KB Output is correct
31 Correct 1 ms 1448 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 1484 KB Output is correct
34 Correct 0 ms 204 KB Output is correct
35 Correct 1 ms 288 KB Output is correct
36 Correct 1 ms 1612 KB Output is correct
37 Correct 1 ms 1456 KB Output is correct
38 Correct 0 ms 296 KB Output is correct
39 Correct 1 ms 1484 KB Output is correct
40 Correct 1 ms 1484 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 1 ms 1356 KB Output is correct
2 Correct 1 ms 1448 KB Output is correct
3 Correct 1 ms 1484 KB Output is correct
4 Correct 1 ms 1484 KB Output is correct
5 Correct 1 ms 1356 KB Output is correct
6 Correct 1 ms 1452 KB Output is correct
7 Correct 1 ms 1356 KB Output is correct
8 Correct 0 ms 304 KB Output is correct
9 Correct 1 ms 1484 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 1356 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 1484 KB Output is correct
15 Correct 1 ms 1484 KB Output is correct
16 Correct 1 ms 1452 KB Output is correct
17 Correct 1 ms 1356 KB Output is correct
18 Correct 1 ms 1444 KB Output is correct
19 Correct 1 ms 1484 KB Output is correct
20 Correct 1 ms 1484 KB Output is correct
21 Correct 1 ms 1356 KB Output is correct
22 Correct 1 ms 1484 KB Output is correct
23 Correct 1 ms 1484 KB Output is correct
24 Correct 1 ms 1484 KB Output is correct
25 Correct 1 ms 1448 KB Output is correct
26 Correct 1 ms 1484 KB Output is correct
27 Correct 0 ms 204 KB Output is correct
28 Correct 1 ms 1484 KB Output is correct
29 Correct 1 ms 296 KB Output is correct
30 Correct 0 ms 204 KB Output is correct
31 Correct 1 ms 1448 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 1484 KB Output is correct
34 Correct 0 ms 204 KB Output is correct
35 Correct 1 ms 288 KB Output is correct
36 Correct 1 ms 1612 KB Output is correct
37 Correct 1 ms 1456 KB Output is correct
38 Correct 0 ms 296 KB Output is correct
39 Correct 1 ms 1484 KB Output is correct
40 Correct 1 ms 1484 KB Output is correct
41 Correct 1 ms 1356 KB Output is correct
42 Correct 1 ms 1484 KB Output is correct
43 Correct 1 ms 1452 KB Output is correct
44 Correct 1 ms 1484 KB Output is correct
45 Correct 1 ms 1488 KB Output is correct
46 Correct 1 ms 1352 KB Output is correct
47 Correct 1 ms 1488 KB Output is correct
48 Correct 1 ms 208 KB Output is correct
49 Correct 1 ms 1456 KB Output is correct
50 Correct 1 ms 208 KB Output is correct
51 Correct 1 ms 304 KB Output is correct
52 Correct 1 ms 208 KB Output is correct
53 Correct 1 ms 208 KB Output is correct
54 Correct 1 ms 1452 KB Output is correct
55 Correct 1 ms 1488 KB Output is correct
56 Correct 1 ms 1488 KB Output is correct
57 Correct 1 ms 1488 KB Output is correct
58 Correct 1 ms 1460 KB Output is correct
59 Correct 1 ms 1488 KB Output is correct
60 Correct 1 ms 1488 KB Output is correct
61 Correct 1 ms 1488 KB Output is correct
62 Correct 0 ms 208 KB Output is correct
63 Correct 1 ms 208 KB Output is correct
64 Correct 1 ms 1488 KB Output is correct
65 Correct 0 ms 208 KB Output is correct
66 Correct 1 ms 1456 KB Output is correct
67 Correct 1 ms 1488 KB Output is correct
68 Correct 1 ms 1360 KB Output is correct
69 Correct 1 ms 1488 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 1 ms 1356 KB Output is correct
2 Correct 1 ms 1448 KB Output is correct
3 Correct 1 ms 1484 KB Output is correct
4 Correct 1 ms 1484 KB Output is correct
5 Correct 1 ms 1356 KB Output is correct
6 Correct 1 ms 1452 KB Output is correct
7 Correct 1 ms 1356 KB Output is correct
8 Correct 0 ms 304 KB Output is correct
9 Correct 1 ms 1484 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 1356 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 1484 KB Output is correct
15 Correct 1 ms 1484 KB Output is correct
16 Correct 1 ms 1452 KB Output is correct
17 Correct 1 ms 1356 KB Output is correct
18 Correct 1 ms 1444 KB Output is correct
19 Correct 1 ms 1484 KB Output is correct
20 Correct 1 ms 1484 KB Output is correct
21 Correct 1 ms 1356 KB Output is correct
22 Correct 1 ms 1484 KB Output is correct
23 Correct 1 ms 1484 KB Output is correct
24 Correct 1 ms 1484 KB Output is correct
25 Correct 1 ms 1448 KB Output is correct
26 Correct 1 ms 1484 KB Output is correct
27 Correct 0 ms 204 KB Output is correct
28 Correct 1 ms 1484 KB Output is correct
29 Correct 1 ms 296 KB Output is correct
30 Correct 0 ms 204 KB Output is correct
31 Correct 1 ms 1448 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 1484 KB Output is correct
34 Correct 0 ms 204 KB Output is correct
35 Correct 1 ms 288 KB Output is correct
36 Correct 1 ms 1612 KB Output is correct
37 Correct 1 ms 1456 KB Output is correct
38 Correct 0 ms 296 KB Output is correct
39 Correct 1 ms 1484 KB Output is correct
40 Correct 1 ms 1484 KB Output is correct
41 Correct 1 ms 1356 KB Output is correct
42 Correct 1 ms 1484 KB Output is correct
43 Correct 1 ms 1452 KB Output is correct
44 Correct 1 ms 1484 KB Output is correct
45 Correct 1 ms 1488 KB Output is correct
46 Correct 1 ms 1352 KB Output is correct
47 Correct 1 ms 1488 KB Output is correct
48 Correct 1 ms 208 KB Output is correct
49 Correct 1 ms 1456 KB Output is correct
50 Correct 1 ms 208 KB Output is correct
51 Correct 1 ms 304 KB Output is correct
52 Correct 1 ms 208 KB Output is correct
53 Correct 1 ms 208 KB Output is correct
54 Correct 1 ms 1452 KB Output is correct
55 Correct 1 ms 1488 KB Output is correct
56 Correct 1 ms 1488 KB Output is correct
57 Correct 1 ms 1488 KB Output is correct
58 Correct 1 ms 1460 KB Output is correct
59 Correct 1 ms 1488 KB Output is correct
60 Correct 1 ms 1488 KB Output is correct
61 Correct 1 ms 1488 KB Output is correct
62 Correct 0 ms 208 KB Output is correct
63 Correct 1 ms 208 KB Output is correct
64 Correct 1 ms 1488 KB Output is correct
65 Correct 0 ms 208 KB Output is correct
66 Correct 1 ms 1456 KB Output is correct
67 Correct 1 ms 1488 KB Output is correct
68 Correct 1 ms 1360 KB Output is correct
69 Correct 1 ms 1488 KB Output is correct
70 Correct 1 ms 1488 KB Output is correct
71 Correct 1 ms 1488 KB Output is correct
72 Correct 1 ms 1488 KB Output is correct
73 Correct 1 ms 1452 KB Output is correct
74 Correct 1 ms 1488 KB Output is correct
75 Correct 1 ms 1360 KB Output is correct
76 Correct 1 ms 208 KB Output is correct
77 Correct 1 ms 1488 KB Output is correct
78 Correct 0 ms 208 KB Output is correct
79 Correct 1 ms 208 KB Output is correct
80 Correct 1 ms 308 KB Output is correct
81 Correct 1 ms 1488 KB Output is correct
82 Correct 1 ms 1488 KB Output is correct
83 Correct 1 ms 1488 KB Output is correct
84 Correct 1 ms 1488 KB Output is correct
85 Correct 1 ms 1488 KB Output is correct
86 Correct 1 ms 1452 KB Output is correct
87 Correct 1 ms 1488 KB Output is correct
88 Correct 1 ms 1488 KB Output is correct
89 Correct 0 ms 208 KB Output is correct
90 Correct 1 ms 1488 KB Output is correct
91 Correct 1 ms 1488 KB Output is correct
92 Correct 1 ms 1488 KB Output is correct
93 Correct 1 ms 1488 KB Output is correct
94 Correct 0 ms 300 KB Output is correct
95 Correct 1 ms 1488 KB Output is correct
96 Correct 2 ms 1488 KB Output is correct
97 Correct 1 ms 1488 KB Output is correct
98 Correct 1 ms 1460 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 27 ms 4804 KB Output is correct
2 Correct 2 ms 2252 KB Output is correct
3 Correct 10 ms 1720 KB Output is correct
4 Correct 15 ms 3636 KB Output is correct
5 Correct 36 ms 5312 KB Output is correct
6 Correct 20 ms 3012 KB Output is correct
7 Correct 34 ms 4996 KB Output is correct
8 Correct 2 ms 2228 KB Output is correct
9 Correct 2 ms 2228 KB Output is correct
10 Correct 39 ms 5632 KB Output is correct
11 Correct 28 ms 4648 KB Output is correct
12 Correct 33 ms 4740 KB Output is correct
13 Correct 1 ms 972 KB Output is correct
14 Correct 1 ms 972 KB Output is correct
15 Correct 36 ms 5024 KB Output is correct
16 Correct 10 ms 2148 KB Output is correct
17 Correct 36 ms 5060 KB Output is correct
18 Correct 36 ms 4036 KB Output is correct
19 Correct 2 ms 776 KB Output is correct
20 Correct 38 ms 5324 KB Output is correct
# Verdict Execution time Memory Grader output
1 Correct 1 ms 1356 KB Output is correct
2 Correct 1 ms 1448 KB Output is correct
3 Correct 1 ms 1484 KB Output is correct
4 Correct 1 ms 1484 KB Output is correct
5 Correct 1 ms 1356 KB Output is correct
6 Correct 1 ms 1452 KB Output is correct
7 Correct 1 ms 1356 KB Output is correct
8 Correct 0 ms 304 KB Output is correct
9 Correct 1 ms 1484 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 0 ms 204 KB Output is correct
12 Correct 1 ms 1356 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 1484 KB Output is correct
15 Correct 1 ms 1484 KB Output is correct
16 Correct 1 ms 1452 KB Output is correct
17 Correct 1 ms 1356 KB Output is correct
18 Correct 1 ms 1444 KB Output is correct
19 Correct 1 ms 1484 KB Output is correct
20 Correct 1 ms 1484 KB Output is correct
21 Correct 1 ms 1356 KB Output is correct
22 Correct 1 ms 1484 KB Output is correct
23 Correct 1 ms 1484 KB Output is correct
24 Correct 1 ms 1484 KB Output is correct
25 Correct 1 ms 1448 KB Output is correct
26 Correct 1 ms 1484 KB Output is correct
27 Correct 0 ms 204 KB Output is correct
28 Correct 1 ms 1484 KB Output is correct
29 Correct 1 ms 296 KB Output is correct
30 Correct 0 ms 204 KB Output is correct
31 Correct 1 ms 1448 KB Output is correct
32 Correct 1 ms 204 KB Output is correct
33 Correct 1 ms 1484 KB Output is correct
34 Correct 0 ms 204 KB Output is correct
35 Correct 1 ms 288 KB Output is correct
36 Correct 1 ms 1612 KB Output is correct
37 Correct 1 ms 1456 KB Output is correct
38 Correct 0 ms 296 KB Output is correct
39 Correct 1 ms 1484 KB Output is correct
40 Correct 1 ms 1484 KB Output is correct
41 Correct 1 ms 1356 KB Output is correct
42 Correct 1 ms 1484 KB Output is correct
43 Correct 1 ms 1452 KB Output is correct
44 Correct 1 ms 1484 KB Output is correct
45 Correct 1 ms 1488 KB Output is correct
46 Correct 1 ms 1352 KB Output is correct
47 Correct 1 ms 1488 KB Output is correct
48 Correct 1 ms 208 KB Output is correct
49 Correct 1 ms 1456 KB Output is correct
50 Correct 1 ms 208 KB Output is correct
51 Correct 1 ms 304 KB Output is correct
52 Correct 1 ms 208 KB Output is correct
53 Correct 1 ms 208 KB Output is correct
54 Correct 1 ms 1452 KB Output is correct
55 Correct 1 ms 1488 KB Output is correct
56 Correct 1 ms 1488 KB Output is correct
57 Correct 1 ms 1488 KB Output is correct
58 Correct 1 ms 1460 KB Output is correct
59 Correct 1 ms 1488 KB Output is correct
60 Correct 1 ms 1488 KB Output is correct
61 Correct 1 ms 1488 KB Output is correct
62 Correct 0 ms 208 KB Output is correct
63 Correct 1 ms 208 KB Output is correct
64 Correct 1 ms 1488 KB Output is correct
65 Correct 0 ms 208 KB Output is correct
66 Correct 1 ms 1456 KB Output is correct
67 Correct 1 ms 1488 KB Output is correct
68 Correct 1 ms 1360 KB Output is correct
69 Correct 1 ms 1488 KB Output is correct
70 Correct 1 ms 1488 KB Output is correct
71 Correct 1 ms 1488 KB Output is correct
72 Correct 1 ms 1488 KB Output is correct
73 Correct 1 ms 1452 KB Output is correct
74 Correct 1 ms 1488 KB Output is correct
75 Correct 1 ms 1360 KB Output is correct
76 Correct 1 ms 208 KB Output is correct
77 Correct 1 ms 1488 KB Output is correct
78 Correct 0 ms 208 KB Output is correct
79 Correct 1 ms 208 KB Output is correct
80 Correct 1 ms 308 KB Output is correct
81 Correct 1 ms 1488 KB Output is correct
82 Correct 1 ms 1488 KB Output is correct
83 Correct 1 ms 1488 KB Output is correct
84 Correct 1 ms 1488 KB Output is correct
85 Correct 1 ms 1488 KB Output is correct
86 Correct 1 ms 1452 KB Output is correct
87 Correct 1 ms 1488 KB Output is correct
88 Correct 1 ms 1488 KB Output is correct
89 Correct 0 ms 208 KB Output is correct
90 Correct 1 ms 1488 KB Output is correct
91 Correct 1 ms 1488 KB Output is correct
92 Correct 1 ms 1488 KB Output is correct
93 Correct 1 ms 1488 KB Output is correct
94 Correct 0 ms 300 KB Output is correct
95 Correct 1 ms 1488 KB Output is correct
96 Correct 2 ms 1488 KB Output is correct
97 Correct 1 ms 1488 KB Output is correct
98 Correct 1 ms 1460 KB Output is correct
99 Correct 27 ms 4804 KB Output is correct
100 Correct 2 ms 2252 KB Output is correct
101 Correct 10 ms 1720 KB Output is correct
102 Correct 15 ms 3636 KB Output is correct
103 Correct 36 ms 5312 KB Output is correct
104 Correct 20 ms 3012 KB Output is correct
105 Correct 34 ms 4996 KB Output is correct
106 Correct 2 ms 2228 KB Output is correct
107 Correct 2 ms 2228 KB Output is correct
108 Correct 39 ms 5632 KB Output is correct
109 Correct 28 ms 4648 KB Output is correct
110 Correct 33 ms 4740 KB Output is correct
111 Correct 1 ms 972 KB Output is correct
112 Correct 1 ms 972 KB Output is correct
113 Correct 36 ms 5024 KB Output is correct
114 Correct 10 ms 2148 KB Output is correct
115 Correct 36 ms 5060 KB Output is correct
116 Correct 36 ms 4036 KB Output is correct
117 Correct 2 ms 776 KB Output is correct
118 Correct 38 ms 5324 KB Output is correct
119 Correct 1 ms 2256 KB Output is correct
120 Correct 28 ms 5560 KB Output is correct
121 Correct 18 ms 4164 KB Output is correct
122 Correct 1 ms 1488 KB Output is correct
123 Correct 2 ms 848 KB Output is correct
124 Correct 8 ms 1612 KB Output is correct
125 Correct 11 ms 3216 KB Output is correct
126 Correct 2 ms 2256 KB Output is correct
127 Correct 5 ms 2512 KB Output is correct
128 Correct 31 ms 4912 KB Output is correct
129 Correct 18 ms 3656 KB Output is correct
130 Correct 22 ms 4192 KB Output is correct
131 Correct 1 ms 2256 KB Output is correct
132 Correct 2 ms 2224 KB Output is correct
133 Correct 40 ms 5064 KB Output is correct
134 Correct 11 ms 3016 KB Output is correct
135 Correct 1 ms 2256 KB Output is correct
136 Correct 12 ms 2060 KB Output is correct
137 Correct 17 ms 2740 KB Output is correct
138 Correct 2 ms 2232 KB Output is correct