제출 #727188

#제출 시각아이디문제언어결과실행 시간메모리
727188SanguineChameleon육각형 영역 (APIO21_hexagon)C++17
9 / 100
1 ms304 KiB
#include "hexagon.h"
#include <bits/stdc++.h>
using namespace std;

const long long mod = 1e9 + 7;
const long long one_half = (mod + 1) / 2;
const long long one_third = (mod + 1) / 3;

int draw_territory(int N, int A, int B, vector<int> D, vector<int> L) {
	if (N == 3) {
		int len = L[0] + 1;
		long long A_sum = 1LL * len * (len + 1) % mod * one_half % mod;
		long long B_sum = 1LL * len * (len - 1) % mod * one_half % mod + (len - 1) * len % mod * (len * 2 - 1) % mod * one_half % mod * one_third % mod;
		return (A_sum * A + B_sum * B) % mod;
	}
	return 0;
}
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