Submission #1294067

#	Time	Username	Problem	Language	Result	Execution time	Memory
1294067		thuhienne	Lightning Conductor (POI11_pio)	C++20	63 / 100	317 ms	17400 KiB

pio

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

using ll = long long;

#define re exit(0);
#define thuhien ""

int n,h[500009];

namespace sub1 {
	bool check() {
		return n <= 5000;
	}
	void solve() {
		for (int i = 1;i <= n;i++) {
			int res = 0;
			for (int j = 1;j <= n;j++) {
				res = max(res,h[j] - h[i] + (int)ceil( sqrt( abs(i - j) ) ));
			}
			cout << res << '\n';
		}
	}
}

namespace sub2 {
	bool check() {
		return n <= 200000;
	}
	
	const int LOG = 18;
	
	int sparse[200009][LOG + 1];
	int getmax(int l,int r) {
		l = max(l,1),r = min(r,n);
		if (l > r) return -1e9;
		
		int i = __lg(r - l + 1);
		
		return max(sparse[l][i],sparse[r - (1 << i) + 1][i]);
	}
	void solve() {
		for (int i = 1;i <= n;i++) sparse[i][0] = h[i];
		for (int j = 1;j <= LOG;j++) {
			for (int i = 1;i + (1 << j) - 1 <= n;i++) {
				sparse[i][j] = max(sparse[i][j - 1],sparse[i + (1 << (j - 1))][j - 1]);
			}
		}
		
		for (int i = 1;i <= n;i++) {
			int res = 0;
			for (int can = 1;(can - 1) * (can - 1) <= n;can++) {
				int l = (can - 1) * (can - 1) + 1,r = can * can;
				res = max(res,max(getmax(i - r,i - l),getmax(i + l,i + r)) - h[i] + can);
			}
			cout << res << '\n';
		}
	}
}

int main() {
  ios_base::sync_with_stdio(0);cin.tie(nullptr);
	if (fopen(thuhien".inp","r")) {
		freopen(thuhien".inp","r",stdin);
		freopen(thuhien".out","w",stdout);
	}

	cin >> n;
	for (int i = 1;i <= n;i++) cin >> h[i];
	
	if (sub1::check()) {
		sub1::solve();
		return 0;
	}

//	if (sub2::check()) {
		sub2::solve();
		return 0;
//	}

}

Compilation message (stderr)

pio.cpp: In function 'int main()':
pio.cpp:64:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |                 freopen(thuhien".inp","r",stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
pio.cpp:65:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |                 freopen(thuhien".out","w",stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~

• 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