Submission #692528

#	Time	Username	Problem	Language	Result	Execution time	Memory
692528		tolbi	Chessboard (IZhO18_chessboard)	C++17	23 / 100	26 ms	2900 KiB

chessboard

#pragma optimize("Bismillahirrahmanirrahim")
//█▀█─█──█──█▀█─█─█
//█▄█─█──█──█▄█─█■█
//█─█─█▄─█▄─█─█─█─█
//Allahuekber
//ahmet23 orz...
//Sani buyuk Osman Pasa Plevneden cikmam diyor.
//FatihSultanMehmedHan
//YavuzSultanSelimHan
//AbdulhamidHan
#define author tolbi
#include <bits/stdc++.h>
#ifdef LOCAL
    #include "23.h"
#endif
#define int long long
#define endl '\n'
#define vint(x) vector<int> x
#define deci(x) int x;cin>>x;
#define decstr(x) string x;cin>>x;
#define cinarr(x) for (auto &it : x) cin>>it;
#define coutarr(x) for (auto &it : x) cout<<it<<" ";cout<<endl;
#define sortarr(x) sort(x.begin(),x.end())
#define sortrarr(x) sort(x.rbegin(),x.rend())
#define det(x) cout<<"NO\0YES"+x*3<<endl;
#define INF LONG_LONG_MAX
#define rev(x) reverse(x.begin(),x.end());
#define ios ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define tol(bi) (1LL<<((int)(bi)))
const int MOD = 1e9+7;
using namespace std;
mt19937 ayahya(chrono::high_resolution_clock().now().time_since_epoch().count());
bool isblack(int blok, int x, int y){
    int kk = (((x/blok)%2)+((y/blok)%2))%2;
    return kk;
}
int32_t main(){
    ios;
    int t=1;
    int tno = 0;
    if (!t) cin>>t;
    while (t-(tno++)){
        deci(n);deci(k);
        vector<pair<pair<int,int>,pair<int,int>>> arr(k);
        int all = 0;
        for (int i = 0; i < k; i++){
            cin>>arr[i].first.first>>arr[i].second.first>>arr[i].first.second>>arr[i].second.second;
            arr[i].first.first--;
            arr[i].first.second--;
            arr[i].second.first--;
            arr[i].second.second--;
            all+=(arr[i].second.second-arr[i].second.first+1)*(arr[i].first.second-arr[i].first.first+1);
        }
        int ans = MOD;
        for (int i = 1; i < n; i++){
            if (n%i) continue;
            int say = 0;
            for (int j = 0; j < k; j++){
                for (int z = arr[j].first.first; z <= arr[j].first.second; z++){
                    for (int tt = arr[j].second.first; tt<=arr[j].second.second;tt++){
                        say+=isblack(i,z,tt);
                    }
                }
            }
            int bls = n*n;
            bls=((n/i)*(n/i)/2)*(i*i);
            ans=min(ans,all-say+bls-say);
            ans=min(ans,all-say+n*n-bls-say);
        }
        cout<<ans<<endl;
    }
}

Compilation message (stderr)

chessboard.cpp:1: warning: ignoring '#pragma optimize ' [-Wunknown-pragmas]
    1 | #pragma optimize("Bismillahirrahmanirrahim")
      |

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