Submission #69272

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
69272	2018-08-20 10:55:48	istlemin	Chessboard (IZhO18_chessboard)	C++14	100 / 100	1727 ms	61384 KiB

chessboard

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#include<bits/stdc++.h>
using namespace std;
#define rep(i,a,b) for(int i = a; i<int(b);++i)
#define all(v) v.begin(),v.end()
#define sz(v) v.size()
#define trav(a,c) for(auto a: c)
typedef long long ll;
typedef vector<ll> vi;
typedef pair<ll,ll> pii;
ll n,k;
ll ceilDiv(ll a,ll b){
  return a/b + (a%b!=0);
}
ll getNumBlack(ll x1,ll y1,ll x2,ll y2, ll sq){
    ll x12 = ceilDiv(x1,sq);
  ll y12 = ceilDiv(y1,sq);
  ll x22 = x2/sq;
  ll y22 = y2/sq;
    if((x12+y12)%2==0){ //black in left lower corner
        ll r1,r2;
        if(x22<x12){
            r1 = 0;
            r2 = x2-x1;
 
 
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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