Submission #764202

#	Time	Username	Problem	Language	Result	Execution time	Memory
764202		idkhandle	Crosses on the Grid (FXCUP4_cross)	C++17	8 / 100	40 ms	7400 KiB

cross

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

using ll = long long;

ll SelectCross(int K, vector<int> I, vector<int> O) {
	int n = I.size();
	ll ans = 0;
	for (int i = 0; i < n; i++) {
		ans = max(ans, 2LL * O[i] * I[i] - (ll)I[i] * I[i]);
		// O^2 - 4 * ((O - I) / 2)^2 = O^2 - (O - I)^2 = 2OI - I^2
	}
	return ans;
}

• Subtask 1: 8 / 8
• Subtask 2: 0 / 55
• Subtask 3: 0 / 37