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Submission #498767

# Submission time Handle Problem Language Result Execution time Memory
498767 2021-12-26T10:16:27 Z sireanu_vlad Chessboard (IZhO18_chessboard) C++14
8 / 100
 1 ms 204 KB 
#include <iostream>
using namespace std;

long long n, x;
int k, t;

void f()
{
	x = n*n/2;
	for(int i = n/2; i >= 1; --i)
		if(n % i == 0)
			x = min(x, i*i*((n/i)*(n/i)/2));
	cout << x;
}

bool isprime(long long x)
{
	if(x < 2) return 0;
	if(x == 2 || x == 3) return 1;
	if(x % 2 == 0 || x % 3 == 0) return 0;
	for(int i = 5; i * i <= n; i += 6)
		if(x % i == 0 || x % (i+2) == 0)
			return 0;
	return 1;
}

int main()
{
	cin >> n >> k;
	if(isprime(n)) cout << n*n/2;
	else if(k == 0) f();
	return 0;
}

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #4
0 / 16.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 204 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Incorrect 0 ms 204 KB Output isn't correct
10 Halted 0 ms 0 KB -