Submission #926914

#	Time	Username	Problem	Language	Result	Execution time	Memory
926914		Amaarsaa	Global Warming (CEOI18_glo)	C++14	45 / 100	49 ms	11600 KiB

glo

#include<bits/stdc++.h>

using namespace std;
using ll = long long ;
const int N = 2e5+ 2;

ll a[N], b[N], L[N], R[N];
int main() {
//	freopen("moocast.in", "r", stdin);
//	freopen("moocast.out", "w", stdout);
	ios::sync_with_stdio(false);
	cin.tie(NULL);
	ll t, n, m, ans, s, sum, x, mid, y, r, p, i, j, lo, hi;

	cin >> n >> m;
	
	
	for (i = 1; i <= n; i ++) {
		cin >> a[i];
		b[n - i + 1] = a[i];
	}
	
	vector < ll > Lda(N, 0);
	for (i= 1; i <= n; i ++) {
		lo = 1;
		hi = N;
		while ( lo < hi) {
			mid = (lo + hi)/2;
			if ( Lda[mid] > b[i]) lo = mid + 1;
			else hi = mid;
		}
		L[n - i + 1] = lo;
		Lda[lo] = b[i];
	}
	vector < ll > Lca(N, 1e9);
	for (i = 1; i <= n; i ++) {
		lo = 1;
		hi = N;
		while ( lo < hi) {
			mid = (lo + hi)/2;
			if ( Lca[mid] < (a[i] + m)) lo = mid + 1;
			else hi = mid;
		}
		R[i] = lo - 1;
		
		lo = 1;
		hi = N;
		while ( lo < hi) {
			mid = (lo + hi)/2;
			if ( Lca[mid] < a[i]) lo = mid + 1;
			else hi = mid;
		}
		Lca[lo] = a[i];
	}
	ans = 0;
	for (i= 1; i <= n; i ++) {
		ans = max(ans, R[i] + L[i]);
	}
	cout << ans << endl;
	
}

Compilation message (stderr)

glo.cpp: In function 'int main()':
glo.cpp:13:5: warning: unused variable 't' [-Wunused-variable]
   13 |  ll t, n, m, ans, s, sum, x, mid, y, r, p, i, j, lo, hi;
      |     ^
glo.cpp:13:19: warning: unused variable 's' [-Wunused-variable]
   13 |  ll t, n, m, ans, s, sum, x, mid, y, r, p, i, j, lo, hi;
      |                   ^
glo.cpp:13:22: warning: unused variable 'sum' [-Wunused-variable]
   13 |  ll t, n, m, ans, s, sum, x, mid, y, r, p, i, j, lo, hi;
      |                      ^~~
glo.cpp:13:27: warning: unused variable 'x' [-Wunused-variable]
   13 |  ll t, n, m, ans, s, sum, x, mid, y, r, p, i, j, lo, hi;
      |                           ^
glo.cpp:13:35: warning: unused variable 'y' [-Wunused-variable]
   13 |  ll t, n, m, ans, s, sum, x, mid, y, r, p, i, j, lo, hi;
      |                                   ^
glo.cpp:13:38: warning: unused variable 'r' [-Wunused-variable]
   13 |  ll t, n, m, ans, s, sum, x, mid, y, r, p, i, j, lo, hi;
      |                                      ^
glo.cpp:13:41: warning: unused variable 'p' [-Wunused-variable]
   13 |  ll t, n, m, ans, s, sum, x, mid, y, r, p, i, j, lo, hi;
      |                                         ^
glo.cpp:13:47: warning: unused variable 'j' [-Wunused-variable]
   13 |  ll t, n, m, ans, s, sum, x, mid, y, r, p, i, j, lo, hi;
      |                                               ^

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 0 / 13
• Subtask 4: 10 / 10
• Subtask 5: 20 / 20
• Subtask 6: 0 / 17
• Subtask 7: 0 / 25