Submission #158425

#	Time	Username	Problem	Language	Result	Execution time	Memory
158425		luciocf	Lightning Conductor (POI11_pio)	C++14	63 / 100	1083 ms	45784 KiB

pio

#include <bits/stdc++.h>

using namespace std;
 
const int maxn = 5e5+10;
const int maxl = 21;
 
int n;
int a[maxn];
 
int tab[maxn][maxl];
int lg[maxn];
 
void build(void)
{
	lg[1] = 0;
	for (int i = 2; i < maxn; i++)
		lg[i] = lg[i/2]+1;
 
	for (int i = 1; i <= n; i++)
		tab[i][0] = a[i];
 
	for (int j = 1; j < maxl; j++)
		for (int i = 1; i + (1<<j) <= n+1; i++)
			tab[i][j] = max(tab[i][j-1], tab[i+(1<<(j-1))][j-1]);
}
 
int mx(int l, int r)
{
	int j = lg[r-l+1];
 
	return max(tab[l][j],tab[r-(1<<j)+1][j]);
}
 
int main(void)
{
	scanf("%d", &n);
 
	for (int i = 1; i <= n; i++)
		scanf("%d", &a[i]);
 
	build();
 
	for (int i = 1; i <= n; i++)
	{
		int k = 0;
 
		for (int d = 1; (d-1)*(d-1) <= i; d++)
		{
			int l = max(1, i - d*d);
			int r = min(i-1, i - d*d + 2*d - 2);
 
			if (l > r) break;
 
			k = max(k, mx(l, r) + d);
		}
 
		for (int d = 1; (d-1)*(d-1) <= n-i; d++)
		{
			int l = max(i+1, d*d - 2*d + i + 2);
			int r = min(n, i + d*d);
 
			if (l > r) break;
 
			k = max(k, mx(l, r) + d);
		}
 
		printf("%d\n", max(0, k-a[i]));
	}
}

Compilation message (stderr)

pio.cpp: In function 'int main()':
pio.cpp:37:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~
pio.cpp:40:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &a[i]);
   ~~~~~^~~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 9 / 9
• Subtask 3: 9 / 9
• Subtask 4: 9 / 9
• Subtask 5: 9 / 9
• Subtask 6: 9 / 9
• Subtask 7: 9 / 9
• Subtask 8: 0 / 9
• Subtask 9: 0 / 9
• Subtask 10: 0 / 9
• Subtask 11: 0 / 10