oj.uz

답안 #973583

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
973583 2024-05-02T07:42:32 Z TAhmed33 Global Warming (CEOI18_glo) C++
0 / 100
 2 ms 348 KB 
#include <bits/stdc++.h>
using namespace std;
const int MAXN = 2e5 + 25;
#define mid ((l + r) >> 1)
#define tl (node + 1)
#define tr (node + 2 * (mid - l + 1))
struct BIT {
	int tree[MAXN];
	void update (int a, int b) {
		for (; a < MAXN; a += a & (-a)) tree[a] = max(tree[a], b);
	}
	int get (int x) {
		int ret = 0;
		for (; x > 0; x -= x & (-x)) ret = max(ret, tree[x]);
		return ret;
	}
} cur[2];
int n, x, a[MAXN], dp[MAXN][2];
vector <int> comp;
int f (int x) {
	return lower_bound(comp.begin(), comp.end(), x) - comp.begin();
}
void solve () {
	cin >> n >> x;
	for (int i = 1; i <= n; i++) cin >> a[i];
	comp.push_back(-1e9); comp.back()--;
	for (int i = 1; i <= n; i++) {
		comp.push_back(a[i]);
		comp.push_back(a[i] - x);
	}
	sort(comp.begin(), comp.end());
	comp.resize(unique(comp.begin(), comp.end()) - comp.begin());
	int u = comp.size();
	int ans = 0;
	for (int i = 1; i <= n; i++) {
		dp[i][0] = cur[0].get(f(a[i] - x) - 1) + 1;
		dp[i][1] = max(cur[0].get(f(a[i]) - 1), cur[1].get(f(a[i]) - 1)) + 1;
		cur[0].update(f(a[i] - x), dp[i][0]);
		cur[1].update(f(a[i]), dp[i][1]);
		ans = max({ans, dp[i][0], dp[i][1]});
	}
	cout << ans << '\n';
}
signed main () {
	 #ifndef ONLINE_JUDGE 
		freopen("input_file", "r", stdin);
		freopen("output_file", "w", stdout);
	#endif
	ios::sync_with_stdio(0); cin.tie(0);
	int t = 1; //cin >> t;
	while (t--) solve();
}

Compilation message

glo.cpp: In function 'void solve()':
glo.cpp:33:6: warning: unused variable 'u' [-Wunused-variable]
   33 |  int u = comp.size();
      |      ^
glo.cpp: In function 'int main()':
glo.cpp:46:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |   freopen("input_file", "r", stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~
glo.cpp:47:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   47 |   freopen("output_file", "w", stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 344 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 1 ms 348 KB Output isn't correct
2 Halted 0 ms 0 KB -