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Submission #523568

# Submission time Handle Problem Language Result Execution time Memory
523568 2022-02-07T19:32:24 Z RaresFelix Chessboard (IZhO18_chessboard) C++17
39 / 100
 483 ms 2544 KB 
#include <bits/stdc++.h>
#define MN 107171

using namespace std;
using ll = long long;
int n, k;
vector<tuple<int, int, int, int>> R;

ll calc(ll a, ll b, ll l) {
    if(a % l == 0 && b % l == 0)
        return ((a / l) * (b / l) + 1) / 2 * l * l;
    if(a % l) {
        ll nrseg;
        if(a / l % 2ll == 0) {
            if(b % (2ll * l) <= l) nrseg = (b / (2ll * l)) * l + b % (2 * l);
            else nrseg =  (b / (2ll * l) + 1) * l;
        } else {
            if(b % (2ll * l) <= l) nrseg = (b / (2ll * l)) * l;
            else nrseg = (b / (2ll * l) - 1) * l + b % (2 * l);
        }
        return calc(a - (a % l), b, l) + (a % l) * nrseg;
    }
    return calc(b, a, l);
}
ll sol(int l) {
    ll arie = ((n / l) * (n / l) + 1) / 2 * l * l, selec, hash;
    for(auto [a, b, c, d] : R) {
        selec = calc(c, d, l) + calc(a-1, b-1, l) - calc(c, b-1, l) - calc(a-1, d, l);
        arie += (c - a + 1) * (d - b + 1) - 2 * selec;
    }
    return min(arie, 1ll * n * n - arie);
}
int main() {
    cin >> n >> k;
    for(int i = 1, a, b, c, d; i <= k; ++i)
        cin >> a >> b >> c >> d, R.emplace_back(a, b, c, d);
    ll re = LLONG_MAX;
    for(int i = 1; i < n; ++i)
        if(n % i == 0) re = min(re, sol(i));
    cout << re << "\n";
}

Compilation message

chessboard.cpp: In function 'll sol(int)':
chessboard.cpp:26:59: warning: unused variable 'hash' [-Wunused-variable]
   26 |     ll arie = ((n / l) * (n / l) + 1) / 2 * l * l, selec, hash;
      |                                                           ^~~~

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct

Subtask #2
0 / 8.0

# Verdict Execution time Memory Grader output
1 Incorrect 66 ms 1336 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 216 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 2 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 2 ms 204 KB Output is correct
14 Correct 1 ms 320 KB Output is correct
15 Correct 2 ms 204 KB Output is correct

Subtask #4
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 216 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 2 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 1 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 1 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 204 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 2 ms 204 KB Output is correct
14 Correct 1 ms 320 KB Output is correct
15 Correct 2 ms 204 KB Output is correct
16 Correct 32 ms 840 KB Output is correct
17 Correct 70 ms 2344 KB Output is correct
18 Correct 114 ms 2360 KB Output is correct
19 Correct 435 ms 2544 KB Output is correct
20 Correct 483 ms 2456 KB Output is correct
21 Correct 70 ms 2360 KB Output is correct
22 Correct 2 ms 204 KB Output is correct
23 Correct 74 ms 1440 KB Output is correct
24 Correct 104 ms 2396 KB Output is correct
25 Correct 17 ms 640 KB Output is correct
26 Correct 68 ms 1424 KB Output is correct
27 Correct 104 ms 2496 KB Output is correct
28 Correct 105 ms 2388 KB Output is correct
29 Correct 28 ms 1340 KB Output is correct
30 Correct 4 ms 332 KB Output is correct

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Incorrect 66 ms 1336 KB Output isn't correct
2 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 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 0 ms 204 KB Output is correct
9 Incorrect 66 ms 1336 KB Output isn't correct
10 Halted 0 ms 0 KB -