Submission #495254

#	Time	Username	Problem	Language	Result	Execution time	Memory
495254		kingline	Chessboard (IZhO18_chessboard)	C++17	0 / 100	71 ms	768 KiB

chessboard

#include <bits/stdc++.h>
#define pb push_back
#define ios ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
#define all(data) data.begin() , data.end()
#define endl '\n'
//freopen("nenokku_easy.in", "r", stdin);
//freopen("nenokku_easy.out", "w", stdout);
//#define int long long

using namespace std;

typedef long long ll;
const int N = 1e5 + 5;

int n, k, y[N], x[N];

main() {
    /*ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);*/
    cin >> n >> k;
    for(int kk = 1; kk <= k; kk++) {
        int xx, yy;
        cin >> x[kk] >> y[kk] >> xx >> yy;
    }
    int odd = 0, even = 0;
    for(int i = 1; i <= k; i++) {
        if(x[i] % 2 == y[i] % 2) odd++;
        else even++;
    }
    cout << min((n * n + 1) / 2 + even - odd, n * n / 2 + odd - even);
}

/*
5
2 8 5 1 10
5
2 3 5 3
2 5 3 3
1 4 4
2 3 4 2
1 1 2
*/

Compilation message (stderr)

chessboard.cpp:17:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   17 | main() {
      | ^~~~

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