Submission #168995

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
168995	2019-12-17 11:43:40	cormac	Chessboard (IZhO18_chessboard)	C++14	100 / 100	404 ms	5132 KiB

chessboard

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#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define F0R(i,a) FOR(i,0,a)
#define ROF(i,a,b) for (int i = (b)-1; i >= (a); --i)
#define R0F(i,a) ROF(i,0,a)
using ll = long long;
using bk = tuple<ll, int, int, int, int>;
ll INF = 1LL << 60;
int find(int p, int k) {
    return p / (2 * k) * k + min(k, p % (2 * k));
}
ll count1d(int x, int w, int k) {
    return find(x + w, k) - find(x, k);
}
ll count2d(int x, int y, int w, int h, int k) {
    ll r = count1d(x, w, k); 
    ll c = count1d(y, h, k);
    return r * c + (w-r) * (h-c);
}
int main() {
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
 
 
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• Subtask 1: 8 / 8
• Subtask 2: 8 / 8
• Subtask 3: 15 / 15
• Subtask 4: 16 / 16
• Subtask 5: 23 / 23
• Subtask 6: 30 / 30