Submission #495072

#	Time	Username	Problem	Language	Result	Execution time	Memory
495072		vinnipuh01	Chessboard (IZhO18_chessboard)	C++17	8 / 100	66 ms	268 KiB

chessboard

#include <iostream>
#include <bits/stdc++.h>
#include <cmath>
#include <algorithm>
#include <vector>
#include <deque>
#include <set>
#include <stack>
#include <string>
#include <map>
#include <queue>
#define int long long

using namespace std;

const long long oo = 1000000000000000000;

long long  sum, ans = 0, mx = 0, mn = 1000000000, num, pos;


/*
    ViHHiPuh

   (( `'-""``""-'` ))
     )-__-_.._-__-(
   / --- (o _ o) --- \
   \ .-* ( .0. ) *-. /
   _'-. ,_ '=' _, .-'_
  / `;#'#'# - #'#'#;` \
 \_)) -----'#'----- ((_/
      # --------- #
  '# ------- ------ #'
  /..-'# ------- #'-.\
  _\...-\'# -- #'/-.../_
  ((____)- '#' -(____))


    cout << fixed << setprecision(6) << x;

    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);

    freopen ( "sum.in", "r", stdin )
*/

bool prime_number;

main () {
	int n, m;
	cin >> m >> n;
	prime_number = 1;
	for ( int i = 2; i < m; i ++ ) {
		if ( m % i == 0 ) {
			prime_number = 0;
			break;
		}
	}
	if ( !n || prime_number ) {
		num = m * m;
		ans = oo;
		for ( int i = 1; i < m; i ++ ) {
			if ( m % i == 0 ) {
				sum = i * i;
				mn = num / sum;
				mn = mn / 2;
				ans = min( ans, mn * sum );
			}
		}
		if ( !n )
			cout << ans;
		else {
			num = ( num + 1 ) / 2;
			int x, y, xx, yy;
			for ( int i = 1; i <= n; i ++ ) {
				cin >> x >> y >> xx >> yy;
				if ( ( x + y ) % 2 )
					ans --;
				else
					num --;
			}
			cout << min( ans, num );
		}
	}
	else {
		
	}
}

Compilation message (stderr)

chessboard.cpp:48:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   48 | main () {
      | ^~~~

• Subtask 1: 8 / 8
• Subtask 2: 0 / 8
• Subtask 3: 0 / 15
• Subtask 4: 0 / 16
• Subtask 5: 0 / 23
• Subtask 6: 0 / 30