oj.uz

Submission #732785

# Submission time Handle Problem Language Result Execution time Memory
732785 2023-04-29T09:52:30 Z flappybird None (JOI16_ho_t4) C++17
15 / 100
 133 ms 14328 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC optimize("unroll-loops")
#pragma GCC target("avx,avx2,fma")
using namespace std;
typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
#define MAX 201010
#define MAXS 20
#define INF 1000000000000000001
#define bb ' '
#define ln '\n'
#define Ln '\n'
pii arr[MAX];
int fdiv(int x, int y) {
	if (!y) return 0;
	if (x % y == 0) return x / y;
	if (x < 0) return x / y - 1;
	return x / y;
}
int fmod(int x, int y) {
	if (!y) return x;
	x %= y;
	x += y;
	x %= y;
	return x;
}
bool valid(vector<pii>& v, pii p) {
	int ind = lower_bound(v.begin(), v.end(), p) - v.begin();
	if (ind >= v.size()) return false;
	return v[ind] == p;
}
bool exist(set<pii>& st, pii p) {
	return st.find(p) != st.end();
}
int chkv[3][3];
signed main() {
	ios::sync_with_stdio(false), cin.tie(0);
	int N, K;
	cin >> N >> K;
	int i;
	string s;
	cin >> s;
	for (i = 1; i <= N; i++) {
		arr[i] = arr[i - 1];
		if (s[i - 1] == 'N') arr[i].first++;
		if (s[i - 1] == 'S') arr[i].first--;
		if (s[i - 1] == 'E') arr[i].second++;
		if (s[i - 1] == 'W') arr[i].second--;
	}
	if (arr[N].first > 0) for (i = 1; i <= N; i++) arr[i].first *= -1;
	if (arr[N].second > 0) for (i = 1; i <= N; i++) arr[i].second *= -1;
	vector<pii> v;
	set<pii> real;
	for (i = 1; i <= N; i++) real.insert(arr[i]);
	int X, Y;
	X = -arr[N].first;
	Y = -arr[N].second;
	if (!X && !Y) K = 1;
	if (K == 1) {
		for (i = 0; i <= N; i++) {
			int a, b;
			for (a = arr[i].first - 1; a <= arr[i].first + 1; a++) for (b = arr[i].second - 1; b <= arr[i].second + 1; b++) v.emplace_back(a, b);
		}
		sort(v.begin(), v.end());
		v.erase(unique(v.begin(), v.end()), v.end());
		int ans = 0;
		real.emplace(0, 0);
		for (auto& [x, y] : v) {
			if (exist(real, pii(x, y)) && exist(real, pii(x, y + 1)) && exist(real, pii(x + 1, y)) && exist(real, pii(x + 1, y + 1))) ans++;
		}
		cout << ans << ln;
		return 0;
	}
	for (i = 1; i <= N; i++) {
		int a, b;
		for (a = arr[i].first - 1; a <= arr[i].first + 1; a++) for (b = arr[i].second - 1; b <= arr[i].second + 1; b++) v.emplace_back(a, b);
	}
	sort(v.begin(), v.end());
	v.erase(unique(v.begin(), v.end()), v.end());
	map<tuple<int, int, int>, int> chk;
	map<pii, int> mp;
	for (auto& [x, y] : v) {
		auto t = make_tuple(fmod(x, X), fmod(y, Y), fdiv(x, X) - fdiv(y, Y));
		if (!X) t = make_tuple(fmod(x, X), fmod(y, Y), 0);
		if (!Y) t = make_tuple(fmod(x, X), fmod(y, Y), 0);
		int res = -1;
		int v;
		if (!Y) v = fdiv(x, X);
		else v = fdiv(y, Y);
		if (chk.find(t) != chk.end()) res = v - chk[t];
		mp[pii(x, y)] = res;
		if (exist(real, pii(x, y))) chk[t] = v;
	}
	ll ans = 0;
	for (auto& [x, y] : v) {
		int mx0, mx1;
		mx0 = mx1 = -1;
		int c = 1;
		int cnt = 0;
		int r = 0;
		for (auto xx : { x, x + 1 }) {
			for (auto yy : { y, y + 1 }) {
				if (real.find(pii(xx, yy)) != real.end()) {
					cnt++;
					if (!~mp[pii(xx, yy)]) r = 1;
					mx1 = max(mx1, mp[pii(xx, yy)]);
				}
				else {
					if (!~mp[pii(xx, yy)]) {
						c = 0;
						break;
					}
					mx0 = max(mx0, mp[pii(xx, yy)]);
				}
				if (!valid(v, pii(xx, yy))) {
					c = 0;
					break;
				}
			}
			if (!c) break;
		}
		if (!c) continue;
		if (!cnt) continue;
		if (cnt == 4) {
			ans += K;
			continue;
		}
		if (r) mx1 = K;
		if (!~mx0 && cnt < 4) continue;
		mx1 = min(K, mx1);
		ans += max(0, mx1 - mx0);
	}
	auto findmin = [&](int x, int y) {
		int mn = K;
		for (int t = 1; t <= N; t++) {
			int dx = arr[t].first - x;
			int dy = arr[t].second - y;
			if ((!X || dx % X == 0) && (!Y || dy % Y == 0)) {
				int t1, t2;
				t1 = t2 = -1;
				if (dx < 0 || dy < 0) continue;
				if (X) t1 = dx / X;
				if (Y) t2 = dy / Y;
				if (!~t1) t1 = t2;
				if (!~t2) t2 = t1;
				if (t1 == t2) mn = min(mn, t1);
			}
		}
		return mn;
	};
	int j;
	if (findmin(0, 0) >= K) {
		for (i = -1; i <= 1; i++) for (j = -1; j <= 1; j++) {
			chkv[i + 1][j + 1] = findmin(i, j);
		}
		if (chkv[0][0] < K && chkv[0][1] < K && chkv[1][0] < K) ans++;
		if (chkv[1][0] < K && chkv[2][0] < K && chkv[2][1] < K) ans++;
		if (chkv[0][1] < K && chkv[0][2] < K && chkv[1][2] < K) ans++;
		if (chkv[2][2] < K && chkv[2][1] < K && chkv[1][2] < K) ans++;
	}
	cout << ans << ln;
}

Compilation message

2016_ho_t4.cpp: In function 'bool valid(std::vector<std::pair<int, int> >&, pii)':
2016_ho_t4.cpp:32:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |  if (ind >= v.size()) return false;
      |      ~~~~^~~~~~~~~~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 224 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 440 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 292 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 332 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 224 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 440 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 292 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 332 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 4 ms 1104 KB Output is correct
28 Correct 12 ms 2760 KB Output is correct
29 Correct 38 ms 5700 KB Output is correct
30 Correct 53 ms 10052 KB Output is correct
31 Correct 133 ms 13632 KB Output is correct
32 Correct 82 ms 10556 KB Output is correct
33 Correct 78 ms 10752 KB Output is correct
34 Correct 80 ms 10812 KB Output is correct
35 Correct 79 ms 10816 KB Output is correct
36 Correct 81 ms 10664 KB Output is correct
37 Correct 83 ms 10672 KB Output is correct
38 Correct 76 ms 10696 KB Output is correct
39 Correct 78 ms 10780 KB Output is correct
40 Correct 75 ms 10564 KB Output is correct
41 Correct 93 ms 10576 KB Output is correct
42 Correct 74 ms 10308 KB Output is correct
43 Correct 75 ms 10820 KB Output is correct
44 Correct 75 ms 10696 KB Output is correct
45 Correct 76 ms 10440 KB Output is correct
46 Correct 118 ms 11876 KB Output is correct
47 Correct 102 ms 11968 KB Output is correct
48 Correct 112 ms 14308 KB Output is correct
49 Correct 84 ms 14296 KB Output is correct
50 Correct 87 ms 14328 KB Output is correct

Subtask #3
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 224 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 440 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 292 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 332 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 0 ms 212 KB Output is correct
28 Correct 1 ms 340 KB Output is correct
29 Correct 1 ms 340 KB Output is correct
30 Incorrect 1 ms 340 KB Output isn't correct
31 Halted 0 ms 0 KB -

Subtask #4
0 / 62.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 340 KB Output is correct
2 Correct 1 ms 340 KB Output is correct
3 Correct 0 ms 224 KB Output is correct
4 Correct 1 ms 212 KB Output is correct
5 Correct 1 ms 212 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 440 KB Output is correct
8 Correct 1 ms 212 KB Output is correct
9 Correct 0 ms 340 KB Output is correct
10 Correct 1 ms 292 KB Output is correct
11 Correct 1 ms 336 KB Output is correct
12 Correct 1 ms 340 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 0 ms 340 KB Output is correct
15 Correct 0 ms 332 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 1 ms 340 KB Output is correct
20 Correct 0 ms 340 KB Output is correct
21 Correct 1 ms 344 KB Output is correct
22 Correct 1 ms 340 KB Output is correct
23 Correct 1 ms 212 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 1 ms 340 KB Output is correct
26 Correct 1 ms 340 KB Output is correct
27 Correct 4 ms 1104 KB Output is correct
28 Correct 12 ms 2760 KB Output is correct
29 Correct 38 ms 5700 KB Output is correct
30 Correct 53 ms 10052 KB Output is correct
31 Correct 133 ms 13632 KB Output is correct
32 Correct 82 ms 10556 KB Output is correct
33 Correct 78 ms 10752 KB Output is correct
34 Correct 80 ms 10812 KB Output is correct
35 Correct 79 ms 10816 KB Output is correct
36 Correct 81 ms 10664 KB Output is correct
37 Correct 83 ms 10672 KB Output is correct
38 Correct 76 ms 10696 KB Output is correct
39 Correct 78 ms 10780 KB Output is correct
40 Correct 75 ms 10564 KB Output is correct
41 Correct 93 ms 10576 KB Output is correct
42 Correct 74 ms 10308 KB Output is correct
43 Correct 75 ms 10820 KB Output is correct
44 Correct 75 ms 10696 KB Output is correct
45 Correct 76 ms 10440 KB Output is correct
46 Correct 118 ms 11876 KB Output is correct
47 Correct 102 ms 11968 KB Output is correct
48 Correct 112 ms 14308 KB Output is correct
49 Correct 84 ms 14296 KB Output is correct
50 Correct 87 ms 14328 KB Output is correct
51 Correct 1 ms 340 KB Output is correct
52 Correct 0 ms 212 KB Output is correct
53 Correct 1 ms 340 KB Output is correct
54 Correct 1 ms 340 KB Output is correct
55 Incorrect 1 ms 340 KB Output isn't correct
56 Halted 0 ms 0 KB -