CF1295A Display The Number

You have a large electronic screen which can display up to $ 998244353 $ decimal digits. The digits are displayed in the same way as on different electronic alarm clocks: each place for a digit consists of $ 7 $ segments which can be turned on and off to compose different digits. The following picture describes how you can display all $ 10 $ decimal digits:  As you can see, different digits may require different number of segments to be turned on. For example, if you want to display $ 1 $ , you have to turn on $ 2 $ segments of the screen, and if you want to display $ 8 $ , all $ 7 $ segments of some place to display a digit should be turned on. You want to display a really large integer on the screen. Unfortunately, the screen is bugged: no more than $ n $ segments can be turned on simultaneously. So now you wonder what is the greatest integer that can be displayed by turning on no more than $ n $ segments. Your program should be able to process $ t $ different test cases.

The first line contains one integer $ t $ ( $ 1 \le t \le 100 $ ) — the number of test cases in the input. Then the test cases follow, each of them is represented by a separate line containing one integer $ n $ ( $ 2 \le n \le 10^5 $ ) — the maximum number of segments that can be turned on in the corresponding testcase. It is guaranteed that the sum of $ n $ over all test cases in the input does not exceed $ 10^5 $ .

For each test case, print the greatest integer that can be displayed by turning on no more than $ n $ segments of the screen. Note that the answer may not fit in the standard $ 32 $ -bit or $ 64 $ -bit integral data type.