题目描述
At the Olympic Games, countries are ranked according to the number of medals their athletes won. However, there is more than one possible way of ranking countries by their medals. In Europe, for example, countries are first ranked by the number of gold medals their athletes won. Ties are broken by looking at silver medals, and then at bronze medals. In Canada, however, because Canadian athletes do not win very many gold medals, countries are ranked by the overall number of medals won, giving the same weight to gold, silver, and bronze medals.
In general, a ranking scheme can be thought of as a vector of positive weights. This vector is multiplied with the vector of medals won by each country, and the scalar product of the two vectors defines the score of the respective country, which is then used to produce the ranking. In this general scheme, the European ranking technique corresponds to the weight vector (1020, 1010, 1), whereas the Canadian method corresponds to the vector (1, 1, 1).
In this problem, you will only need to consider weight vectors of the form (1/nj, 1/nk, 1/nl), where n is the total number of medals won by all athletes in the Olympic Games, and j, k, and l are integers.
输入
输出
Given a list of countries and the number of gold, silver, and bronze medals won by each country, print the line
Canada wins!if there is a weight vector of the above form such that Canada ranks first according to the ranking scheme defined by that vector. Print the line
Canada cannot win.if no such vector exists.
样例输入 Copy
2
Canada 3 2 1
USA 1 2 3
2
USA 2 2 2
Canada 1 1 1
0
样例输出 Copy
Canada wins!
Canada cannot win.