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Submission #495268

# Submission time Handle Problem Language Result Execution time Memory
495268 2021-12-18T08:17:16 Z kingline Chessboard (IZhO18_chessboard) C++17
8 / 100
 92 ms 1612 KB 
#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;
    if(!k) {
        cout << n * n / 2;
        return 0;
    }
    int even = 0, odd = 0;
    for(int i = 1; i <= k; i++) {
        int xx, yy;
        cin >> x[i] >> y[i] >> xx >> yy;
        if(xx % 2 == yy % 2) ++odd;
        else even++;
    }
    int ev = (n * n + 1) / 2, od = (n * n) / 2;
    cout << min(ev - odd + even, od - even + odd);
}

/*
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

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

Subtask #1
0 / 8.0

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

Subtask #2
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 63 ms 1164 KB Output is correct
2 Correct 16 ms 556 KB Output is correct
3 Correct 40 ms 828 KB Output is correct
4 Correct 47 ms 912 KB Output is correct
5 Correct 76 ms 1060 KB Output is correct
6 Correct 39 ms 708 KB Output is correct
7 Correct 9 ms 372 KB Output is correct
8 Correct 40 ms 732 KB Output is correct
9 Correct 92 ms 1612 KB Output is correct
10 Correct 57 ms 1032 KB Output is correct

Subtask #3
0 / 15.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 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 1 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 Correct 63 ms 1164 KB Output is correct
2 Correct 16 ms 556 KB Output is correct
3 Correct 40 ms 828 KB Output is correct
4 Correct 47 ms 912 KB Output is correct
5 Correct 76 ms 1060 KB Output is correct
6 Correct 39 ms 708 KB Output is correct
7 Correct 9 ms 372 KB Output is correct
8 Correct 40 ms 732 KB Output is correct
9 Correct 92 ms 1612 KB Output is correct
10 Correct 57 ms 1032 KB Output is correct
11 Incorrect 1 ms 204 KB Output isn't correct
12 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 Incorrect 0 ms 204 KB Output isn't correct
3 Halted 0 ms 0 KB -