Submission #290546

#	Time	Username	Problem	Language	Result	Execution time	Memory
290546		luysasg	Chessboard (IZhO18_chessboard)	C++17	8 / 100	137 ms	384 KiB

chessboard

#include <bits/stdc++.h>
using namespace std;
int main(){
	int n, k;
	cin >> n >> k;
	if(k==0){
		long long int num=0,resp;
		for(int i=3;i<n;i+=2){
			if(n%i==0){
				num=n/i;
				break;
			}
		}
		if(num==0){
			resp=(n*n)/2;
		}
		else{
			long long int exp=num*num;
			long long int total=n*n;
			resp = (total-exp)/2;
		}
		cout << resp << endl;
	}
	else{
		long long int a, b, c, d, msm=0, dif=0;
		long long resp=0;
		for(int i=0;i<k;i++){
			cin >> a >> b >> c >> d;
			if(a%2 == b%2){
				msm++;
			}
			else{
				dif++;
			}
		}
		if(msm>dif){
			resp+=(dif+(((n*n)/2)+1-msm));
		}
		else{
			resp+=(msm+((n*n)/2-dif));
		}
		cout << resp << endl;
	}
}

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