Codeforces Round 935 (Div. 3) （A~G）

1945A - Setting up Camp 

        题意：三种人安排住宿,a只能跟自己住,b只能三个人住,c能1~3个人，问最终最少房间数

        思路：a单独安排,b放一起,不足三个人的用c补,然后c按照3人一房间尽可能分配

void solve() 
{
	int a , b , c;
	cin >> a >> b >> c;
	int ans = a + b / 3;
	b %= 3;
	int res = b + c;
	if(res == 0){
		cout  s;
	s = " " + s;
	int left = 0, right = 0;
	for(int i = 1 ; i  a[i];
	for(int i = 1 ; i > b[i];
	//如果b[i] > x;
	int pos = 0;
	for(int i = 1 ; i > a[i];
		if(a[i] == x)
			pos = i;
	}
	for(int i = 1 ; i  1){
			int mid = (l + r) / 2;
			if(a[mid]