Submission #895295

#	Time	Username	Problem	Language	Result	Execution time	Memory
895295		Andrey	Chessboard (IZhO18_chessboard)	C++14	100 / 100	557 ms	6320 KiB

chessboard

#include<bits/stdc++.h>
using namespace std;

long long calc(long long x1, long long x2, long long y1, long long y2, long long k) {
    long long br1 = (x2/(2*k))*k+min(k-1,x2%(2*k))+1;
    if(x1 > 0) {
        x1--;
        br1-=(x1/(2*k))*k+min(k-1,x1%(2*k))+1;
    }
    else {
        x1--;
    }
    long long br2 = (y2/(2*k))*k+min(k-1,y2%(2*k))+1;
    if(y1 > 0) {
        y1--;
        br2-=(y1/(2*k))*k+min(k-1,y1%(2*k))+1;
    }
    else {
        y1--;
    }
    return br1*br2+(x2-x1-br1)*(y2-y1-br2);
}

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    long long n,k,x1,y1,x2,y2,ans = LLONG_MAX;
    cin >> n >> k;
    vector<pair<long long,long long>> haha(0);
    vector<pair<long long,long long>> bruh(0);
    for(long long i = 0; i < k; i++) {
        cin >> x1 >> y1 >> x2 >> y2;
        haha.push_back({x1-1,y1-1});
        bruh.push_back({x2-1,y2-1});
    }
    for(long long i = 1; i < n; i++) {
        if(n%i == 0) {
            long long br = (((n/i)*(n/i)+1)/2)*i*i;
            for(long long j = 0; j < k; j++) {
                long long c = (bruh[j].second-haha[j].second+1)*(bruh[j].first-haha[j].first+1)-2*calc(haha[j].first,bruh[j].first,haha[j].second,bruh[j].second,i);
                br+=c;
            }
            ans = min(ans,br);
            br = (((n/i)*(n/i))/2)*i*i;
            for(long long j = 0; j < k; j++) {
                long long c = (bruh[j].second-haha[j].second+1)*(bruh[j].first-haha[j].first+1)-2*calc(haha[j].first,bruh[j].first,haha[j].second,bruh[j].second,i);
                br-=c;
            }
            ans = min(ans,br);
        }
    }
    cout << ans;
    return 0;
}

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