#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 = ans;
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
chessboard.cpp:48:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
48 | main () {
| ^~~~
chessboard.cpp: In function 'int main()':
chessboard.cpp:74:12: error: 'x' was not declared in this scope
74 | cin >> x >> y >> xx >> yy;
| ^
chessboard.cpp:74:17: error: 'y' was not declared in this scope
74 | cin >> x >> y >> xx >> yy;
| ^
chessboard.cpp:74:22: error: 'xx' was not declared in this scope; did you mean 'mx'?
74 | cin >> x >> y >> xx >> yy;
| ^~
| mx
chessboard.cpp:74:28: error: 'yy' was not declared in this scope; did you mean 'yn'?
74 | cin >> x >> y >> xx >> yy;
| ^~
| yn
