oj.uz

Submission #554632

# Submission time Handle Problem Language Result Execution time Memory
554632 2022-04-29T01:35:42 Z pavement Lamps (JOI19_lamps) C++17
6 / 100
 1000 ms 2204 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
#ifdef _WIN32
#define getchar_unlocked _getchar_nolock
#endif
//#define int long long
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define ppb pop_back
#define eb emplace_back
#define g0(a) get<0>(a)
#define g1(a) get<1>(a)
#define g2(a) get<2>(a)
#define g3(a) get<3>(a)
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
using db = double;
using ll = long long;
using ld = long double;
using ii = pair<int, int>;
using iii = tuple<int, int, int>;
using iiii = tuple<int, int, int, int>;
template<class key, class value = null_type, class cmp = less<key> >
using ordered_set = tree<key, value, cmp, rb_tree_tag, tree_order_statistics_node_update>;

int N;
vector<int> dp[2];
bool A[1000005], B[1000005];
char C;

vector<ii> vec;

bool apply(bool x, int b) {
	int bm = vec[b].second;
	for (int k = 0; k < vec[b].first; k++) {
		if (bm % 3 == 0) x = 0;
		else if (bm % 3 == 1) x = 1;
		else x ^= 1;
		bm /= 3;
	}
	return x;
}

bool is_subseq(string a, string b) {
	int pos = 0;
	for (int i = 0; i < b.size(); i++) {
		while (pos < a.size() && b[i] != a[pos]) pos++;
		if (pos < a.size()) pos++;
		else return 0;
	}
	return 1;
}

string conv(int x) {
	string s = "";
	int bm = vec[x].second;
	for (int k = 0; k < vec[x].first; k++) {
		s.pb(bm % 3);
		bm /= 3;
	}
	return s;
}

int cst(int a, int b) {
	int lcp = 0;
	string sa = conv(a), sb = conv(b);
	for (int i = 0; i < min(sa.size(), sb.size()); i++)
		if (is_subseq(sa, sb.substr(0, i + 1))) lcp = i + 1;
		else break;
	return sb.size() - lcp;
}

main() {
	ios::sync_with_stdio(0);
	cin.tie(0);
	cin >> N;
	for (int i = 0, p = 1; i <= 4; i++) {
		for (int j = 0; j < p; j++) vec.eb(i, j);
		p *= 3;
	}
	for (int i = 1; i <= N; i++) {
		cin >> C;
		A[i] = C == '1';
	}
	for (int i = 1; i <= N; i++) {
		cin >> C;
		B[i] = C == '1';
	}
	dp[0].resize(vec.size());
	dp[1].resize(vec.size());
	for (int i = N; i >= 1; i--)
		for (int b = 0; b < vec.size(); b++) {
			dp[i & 1][b] = INT_MAX;
			for (int nb = 0; nb < vec.size(); nb++)
				if (apply(A[i], nb) == B[i]) dp[i & 1][b] = min(dp[i & 1][b], dp[i & 1 ^ 1][nb] + cst(b, nb));
		}
	cout << dp[1][0] << '\n';
}

Compilation message

lamp.cpp: In function 'bool is_subseq(std::string, std::string)':
lamp.cpp:49:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   49 |  for (int i = 0; i < b.size(); i++) {
      |                  ~~^~~~~~~~~~
lamp.cpp:50:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |   while (pos < a.size() && b[i] != a[pos]) pos++;
      |          ~~~~^~~~~~~~~~
lamp.cpp:51:11: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |   if (pos < a.size()) pos++;
      |       ~~~~^~~~~~~~~~
lamp.cpp: In function 'int cst(int, int)':
lamp.cpp:70:20: warning: comparison of integer expressions of different signedness: 'int' and 'const long unsigned int' [-Wsign-compare]
   70 |  for (int i = 0; i < min(sa.size(), sb.size()); i++)
      |                  ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
lamp.cpp: At global scope:
lamp.cpp:76:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   76 | main() {
      | ^~~~
lamp.cpp: In function 'int main()':
lamp.cpp:95:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   95 |   for (int b = 0; b < vec.size(); b++) {
      |                   ~~^~~~~~~~~~~~
lamp.cpp:97:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   97 |    for (int nb = 0; nb < vec.size(); nb++)
      |                     ~~~^~~~~~~~~~~~
lamp.cpp:98:72: warning: suggest parentheses around arithmetic in operand of '^' [-Wparentheses]
   98 |     if (apply(A[i], nb) == B[i]) dp[i & 1][b] = min(dp[i & 1][b], dp[i & 1 ^ 1][nb] + cst(b, nb));
      |                                                                      ~~^~~

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 212 KB Output is correct
4 Correct 3 ms 212 KB Output is correct
5 Correct 3 ms 212 KB Output is correct
6 Correct 3 ms 340 KB Output is correct
7 Correct 3 ms 340 KB Output is correct
8 Correct 19 ms 336 KB Output is correct
9 Correct 19 ms 340 KB Output is correct
10 Correct 18 ms 340 KB Output is correct
11 Correct 17 ms 340 KB Output is correct
12 Correct 20 ms 336 KB Output is correct
13 Correct 19 ms 340 KB Output is correct
14 Correct 20 ms 332 KB Output is correct
15 Correct 18 ms 340 KB Output is correct
16 Correct 19 ms 336 KB Output is correct
17 Correct 18 ms 348 KB Output is correct
18 Correct 20 ms 336 KB Output is correct
19 Correct 18 ms 340 KB Output is correct
20 Correct 22 ms 332 KB Output is correct
21 Correct 20 ms 340 KB Output is correct
22 Correct 22 ms 340 KB Output is correct
23 Correct 21 ms 344 KB Output is correct
24 Correct 19 ms 340 KB Output is correct
25 Correct 18 ms 212 KB Output is correct
26 Correct 20 ms 340 KB Output is correct
27 Correct 18 ms 212 KB Output is correct
28 Correct 22 ms 212 KB Output is correct
29 Correct 20 ms 340 KB Output is correct
30 Correct 18 ms 212 KB Output is correct
31 Correct 17 ms 340 KB Output is correct
32 Correct 21 ms 340 KB Output is correct
33 Correct 19 ms 340 KB Output is correct
34 Correct 17 ms 336 KB Output is correct

Subtask #2
0 / 41.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 212 KB Output is correct
4 Correct 3 ms 212 KB Output is correct
5 Correct 3 ms 212 KB Output is correct
6 Correct 3 ms 340 KB Output is correct
7 Correct 3 ms 340 KB Output is correct
8 Correct 19 ms 336 KB Output is correct
9 Correct 19 ms 340 KB Output is correct
10 Correct 18 ms 340 KB Output is correct
11 Correct 17 ms 340 KB Output is correct
12 Correct 20 ms 336 KB Output is correct
13 Correct 19 ms 340 KB Output is correct
14 Correct 20 ms 332 KB Output is correct
15 Correct 18 ms 340 KB Output is correct
16 Correct 19 ms 336 KB Output is correct
17 Correct 18 ms 348 KB Output is correct
18 Correct 20 ms 336 KB Output is correct
19 Correct 18 ms 340 KB Output is correct
20 Correct 22 ms 332 KB Output is correct
21 Correct 20 ms 340 KB Output is correct
22 Correct 22 ms 340 KB Output is correct
23 Correct 21 ms 344 KB Output is correct
24 Correct 19 ms 340 KB Output is correct
25 Correct 18 ms 212 KB Output is correct
26 Correct 20 ms 340 KB Output is correct
27 Correct 18 ms 212 KB Output is correct
28 Correct 22 ms 212 KB Output is correct
29 Correct 20 ms 340 KB Output is correct
30 Correct 18 ms 212 KB Output is correct
31 Correct 17 ms 340 KB Output is correct
32 Correct 21 ms 340 KB Output is correct
33 Correct 19 ms 340 KB Output is correct
34 Correct 17 ms 336 KB Output is correct
35 Execution timed out 1092 ms 340 KB Time limit exceeded
36 Halted 0 ms 0 KB -

Subtask #3
0 / 4.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 3 ms 340 KB Output is correct
4 Correct 3 ms 212 KB Output is correct
5 Correct 2 ms 340 KB Output is correct
6 Correct 3 ms 340 KB Output is correct
7 Execution timed out 1093 ms 2204 KB Time limit exceeded
8 Halted 0 ms 0 KB -

Subtask #4
0 / 49.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 340 KB Output is correct
2 Correct 2 ms 340 KB Output is correct
3 Correct 2 ms 212 KB Output is correct
4 Correct 3 ms 212 KB Output is correct
5 Correct 3 ms 212 KB Output is correct
6 Correct 3 ms 340 KB Output is correct
7 Correct 3 ms 340 KB Output is correct
8 Correct 19 ms 336 KB Output is correct
9 Correct 19 ms 340 KB Output is correct
10 Correct 18 ms 340 KB Output is correct
11 Correct 17 ms 340 KB Output is correct
12 Correct 20 ms 336 KB Output is correct
13 Correct 19 ms 340 KB Output is correct
14 Correct 20 ms 332 KB Output is correct
15 Correct 18 ms 340 KB Output is correct
16 Correct 19 ms 336 KB Output is correct
17 Correct 18 ms 348 KB Output is correct
18 Correct 20 ms 336 KB Output is correct
19 Correct 18 ms 340 KB Output is correct
20 Correct 22 ms 332 KB Output is correct
21 Correct 20 ms 340 KB Output is correct
22 Correct 22 ms 340 KB Output is correct
23 Correct 21 ms 344 KB Output is correct
24 Correct 19 ms 340 KB Output is correct
25 Correct 18 ms 212 KB Output is correct
26 Correct 20 ms 340 KB Output is correct
27 Correct 18 ms 212 KB Output is correct
28 Correct 22 ms 212 KB Output is correct
29 Correct 20 ms 340 KB Output is correct
30 Correct 18 ms 212 KB Output is correct
31 Correct 17 ms 340 KB Output is correct
32 Correct 21 ms 340 KB Output is correct
33 Correct 19 ms 340 KB Output is correct
34 Correct 17 ms 336 KB Output is correct
35 Execution timed out 1092 ms 340 KB Time limit exceeded
36 Halted 0 ms 0 KB -