Submission #36128

#	Time	Username	Problem	Language	Result	Execution time	Memory
36128		aome	Longest beautiful sequence (IZhO17_subsequence)	C++14	100 / 100	5099 ms	48776 KiB

subsequence

#include <bits/stdc++.h>
using namespace std;

const int N = 100005;
const int M = 1024;
const int INF = 1e9;

int n, a[N], b[N], cnt[M];
int f[N], trace[N];
int g[M][M][11];

int main() {
	// freopen("in.txt", "r", stdin);
	// freopen("out.txt", "w", stdout);
	scanf("%d", &n);
	for (int i = 1; i <= n; ++i) scanf("%d", &a[i]);
	for (int i = 1; i <= n; ++i) scanf("%d", &b[i]);
	for (int i = 0; i < M; ++i) {
		for (int j = 0; j < 10; ++j) cnt[i] += i >> j & 1;
	}
	int pos = 0; f[0] = -INF;
	for (int i = 1; i <= n; ++i) {
		int pre = 0, suf = 0;
		for (int j = 0; j < 10; ++j) {
			if (a[i] >> j & 1) pre |= 1 << j;
		}
		for (int j = 10; j < 20; ++j) {
			if (a[i] >> j & 1) suf |= 1 << (j - 10);
		}
		f[i] = 1;
		for (int j = 0; j < M; ++j) {
			int x = j & pre;
			if (cnt[x] > b[i] || b[i] - cnt[x] > 10) continue;
			int y = g[j][suf][b[i] - cnt[x]];
			if (f[i] < f[y] + 1) {
				f[i] = f[y] + 1, trace[i] = y;
			}
		}
		for (int j = 0; j < M; ++j) {
			int x = suf & j;
			int &y = g[pre][j][cnt[x]];
			if (f[y] < f[i]) y = i;
		}
		if (f[pos] < f[i]) pos = i;
	}
	vector<int> res;
	int cur = pos;
	while (cur) {
		res.push_back(cur), cur = trace[cur];
	}
	reverse(res.begin(), res.end());
	printf("%d\n", res.size());
	for (int i = 0; i < res.size(); ++i) printf("%d ", res[i]);
}

Compilation message (stderr)

subsequence.cpp: In function 'int main()':
subsequence.cpp:52:27: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type {aka long unsigned int}' [-Wformat=]
  printf("%d\n", res.size());
                           ^
subsequence.cpp:53:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for (int i = 0; i < res.size(); ++i) printf("%d ", res[i]);
                    ^
subsequence.cpp:15:17: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
                 ^
subsequence.cpp:16:49: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for (int i = 1; i <= n; ++i) scanf("%d", &a[i]);
                                                 ^
subsequence.cpp:17:49: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for (int i = 1; i <= n; ++i) scanf("%d", &b[i]);
                                                 ^

• Subtask 1: 7 / 7
• Subtask 2: 16 / 16
• Subtask 3: 17 / 17
• Subtask 4: 60 / 60