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Submission #259882

# Submission time Handle Problem Language Result Execution time Memory
259882 2020-08-08T18:45:47 Z peuch Global Warming (CEOI18_glo) C++17
17 / 100
 77 ms 2680 KB 
#include<bits/stdc++.h>
using namespace std;

const int MAXN = 2e5 + 10;
const int INF = 2e9 + 7;

int n, x;
int v[MAXN];
int dp[MAXN];
int maxi[MAXN];
int ans;

int main(){
	scanf("%d %d", &n, &x);
	for(int i = 1; i <= n; i++)
	scanf("%d", &v[i]);
	for(int j = 1; j <= n; j++)
		dp[j] = INF;
	for(int i = 1; i <= n; i++){
		int k = lower_bound(dp, dp + 1 + n, v[i]) - dp;
		dp[k] = v[i];
		maxi[i] = max(maxi[i - 1], k);
	}
	for(int j = 1; j <= n; j++)
		dp[j] = INF;
	dp[0] = -INF;
	for(int i = n; i > 0; i--){
		int aux = lower_bound(dp, dp + 1 + n, -v[i]) - dp;
		aux--;
		int k = lower_bound(dp, dp + 1 + n, -v[i] - x) - dp;
		dp[k] = -v[i] - x;
		ans = max(ans, maxi[i] + aux);
	}
	printf("%d\n", ans);
}

Compilation message

glo.cpp: In function 'int main()':
glo.cpp:14:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &x);
  ~~~~~^~~~~~~~~~~~~~~~~
glo.cpp:16:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &v[i]);
  ~~~~~^~~~~~~~~~~~~

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Incorrect 1 ms 384 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Incorrect 1 ms 384 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Incorrect 1 ms 384 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 77 ms 2680 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 20 ms 896 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 35 ms 1536 KB Output is correct
2 Correct 35 ms 1528 KB Output is correct
3 Correct 75 ms 2680 KB Output is correct
4 Correct 67 ms 2680 KB Output is correct
5 Correct 31 ms 1536 KB Output is correct
6 Correct 49 ms 2552 KB Output is correct
7 Correct 54 ms 2552 KB Output is correct
8 Correct 30 ms 1528 KB Output is correct

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Incorrect 1 ms 384 KB Output isn't correct
4 Halted 0 ms 0 KB -