#include <bits/stdc++.h>
using namespace std;
int main(){
ios::sync_with_stdio(false); cin.tie(nullptr);
int n, k;
cin >> n >> k;
vector <vector <int>> a(n+1, vector <int> (n+1,0)), dp(n+1, vector <int> (n+1,0));
vector <int> x1(k+1), y1(k+1), x2(k+1), y2(k+1);
for(int i = 1; i <= k; i++){
cin >> x1[i] >> y1[i] >> x2[i] >> y2[i];
for(int i1 = x1[i]; i1 <= x2[i]; i1++){
for(int j1 = y1[i]; j1 <= y2[i]; j1++){
a[i1][j1] = 1;
}
}
}
for(int i = 1; i <= n; i++){
for(int j = 1; j <= n; j++){
dp[i][j] = (dp[i-1][j] + dp[i][j-1] - dp[i-1][j-1] + a[i][j]);
}
}
vector <int> v;
for(int i = 1; i < n; i++){
if(n % i == 0){
v.push_back(i);
}
}
int ans = n*n;
for(auto x : v){
int y = 0;
bool tr = 1;
for(int i = 1; i <= n; i += x){
int cnt = 0;
for(int j = 1; j <= n; j += x){
// cout << i << ' ' << j << " " << (dp[i+x-1][j+x-1] - dp[i-1][j+x-1] - dp[i+x-1][j-1] + dp[i-1][j-1]) << "\n";
cnt++;
if(cnt % 2 == tr){
y += ((x*x) - (dp[i+x-1][j+x-1] - dp[i-1][j+x-1] - dp[i+x-1][j-1] + dp[i-1][j-1]));
}
else {
y += (dp[i+x-1][j+x-1] - dp[i-1][j+x-1] - dp[i+x-1][j-1] + dp[i-1][j-1]);
}
}
tr = (1-tr);
}
ans = min(ans,y);
if((n / x) % 2 == 0){
y = 0;
tr = 0;
for(int i = 1; i <= n; i += x){
int cnt = 0;
for(int j = 1; j <= n; j += x){
// cout << i << ' ' << j << " " << (dp[i+x-1][j+x-1] - dp[i-1][j+x-1] - dp[i+x-1][j-1] + dp[i-1][j-1]) << "\n";
cnt++;
if(cnt % 2 == tr){
y += ((x*x) - (dp[i+x-1][j+x-1] - dp[i-1][j+x-1] - dp[i+x-1][j-1] + dp[i-1][j-1]));
}
else {
y += (dp[i+x-1][j+x-1] - dp[i-1][j+x-1] - dp[i+x-1][j-1] + dp[i-1][j-1]);
}
}
tr = (1-tr);#include <bits/stdc++.h>
using namespace std;
int main(){
ios::sync_with_stdio(false); cin.tie(nullptr);
int n, k;
cin >> n >> k;
vector <vector <int>> a(n+1, vector <int> (n+1,0)), dp(n+1, vector <int> (n+1,0));
vector <int> x1(k+1), y1(k+1), x2(k+1), y2(k+1);
for(int i = 1; i <= k; i++){
cin >> x1[i] >> y1[i] >> x2[i] >> y2[i];
for(int i1 = x1[i]; i1 <= x2[i]; i1++){
for(int j1 = y1[i]; j1 <= y2[i]; j1++){
a[i1][j1] = 1;
}
}
}
for(int i = 1; i <= n; i++){
for(int j = 1; j <= n; j++){
dp[i][j] = (dp[i-1][j] + dp[i][j-1] - dp[i-1][j-1] + a[i][j]);
}
}
vector <int> v;
for(int i = 1; i < n; i++){
if(n % i == 0){
v.push_back(i);
}
}
int ans = n*n;
for(auto x : v){
int y = 0;
bool tr = 1;
for(int i = 1; i <= n; i += x){
int cnt = 0;
for(int j = 1; j <= n; j += x){
// cout << i << ' ' << j << " " << (dp[i+x-1][j+x-1] - dp[i-1][j+x-1] - dp[i+x-1][j-1] + dp[i-1][j-1]) << "\n";
cnt++;
if(cnt % 2 == tr){
y += ((x*x) - (dp[i+x-1][j+x-1] - dp[i-1][j+x-1] - dp[i+x-1][j-1] + dp[i-1][j-1]));
}
else {
y += (dp[i+x-1][j+x-1] - dp[i-1][j+x-1] - dp[i+x-1][j-1] + dp[i-1][j-1]);
}
}
tr = (1-tr);
}
ans = min(ans,y);
if((n / x) % 2 == 0){
y = 0;
tr = 0;
for(int i = 1; i <= n; i += x){
int cnt = 0;
for(int j = 1; j <= n; j += x){
// cout << i << ' ' << j << " " << (dp[i+x-1][j+x-1] - dp[i-1][j+x-1] - dp[i+x-1][j-1] + dp[i-1][j-1]) << "\n";
cnt++;
if(cnt % 2 == tr){
y += ((x*x) - (dp[i+x-1][j+x-1] - dp[i-1][j+x-1] - dp[i+x-1][j-1] + dp[i-1][j-1]));
}
else {
y += (dp[i+x-1][j+x-1] - dp[i-1][j+x-1] - dp[i+x-1][j-1] + dp[i-1][j-1]);
}
}
tr = (1-tr);
}
ans = min(ans,y);
}
}
cout << ans;
}
}
ans = min(ans,y);
}
}
cout << ans;
}
Compilation message
chessboard.cpp:65:17: error: stray '#' in program
65 | tr = (1-tr);#include <bits/stdc++.h>
| ^
chessboard.cpp: In function 'int main()':
chessboard.cpp:65:18: error: 'include' was not declared in this scope
65 | tr = (1-tr);#include <bits/stdc++.h>
| ^~~~~~~
chessboard.cpp:65:27: error: 'bits' was not declared in this scope
65 | tr = (1-tr);#include <bits/stdc++.h>
| ^~~~
chessboard.cpp:65:32: error: 'stdc' was not declared in this scope; did you mean 'std'?
65 | tr = (1-tr);#include <bits/stdc++.h>
| ^~~~
| std
chessboard.cpp:67:1: error: expected primary-expression before 'using'
67 | using namespace std;
| ^~~~~
chessboard.cpp:69:11: error: a function-definition is not allowed here before '{' token
69 | int main(){
| ^
