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## ACM_0077 - CREDIT CARD PAYMENT

Using credit cards for your purchases is convenient, but they have high interest rates if you do not pay your balance in full each month.

The interest rate is commonly quoted in terms of “annual percentage rate” (APR) which is then applied to the outstanding balance each month. The APR can be converted to a monthly interest rate R. At the end of each month, the monthly interest rate is applied to the outstanding balance and the interest is added to the total balance. Any payment made will be applied to the balance in the following month.  The monthly interest is rounded to the nearest cent (rounding up 0.5 cent and above) in the calculations.

You have unfortunately accumulated an outstanding balance B at the end of the month and you can only afford to pay up to some amount M every month. If you do not make any more purchases with the credit card, what is the minimum number of payments needed to completely eliminate the outstanding balance? It is possible that you cannot pay off the balance in 100 years (1200 payments).

#### Input

The input consists of multiple test cases. The first line of input is a single integer, not more than 1000, indicating the number of test cases to follow. Each of the following lines specify the input for one case. Each line contains three positive real numbers separated by single spaces: R, B, and M . The real numbers have two digits after the decimal point, satisfying R ≤ 50.00 and B, M ≤ 50000.00. R is the monthly interest rate and is specified as a percentage.

#### Output

For each case, display on a line the minimum number of payments needed to eliminate the outstanding balance. If this cannot be done in at most 1200 payments, print instead impossible.

#### Examples

 № stdin stdout 1 11 2.00 100.00 105.00 2.00 100.00 102.00 2.00 100.00 100.00 2.00 100.00 4.00 2.00 100.00 3.00 2.00 100.00 1.00 2.00 100.00 2.00 9.56 5462.50 522.22 2 12.50 29876.44 33610.99 14.78 40181.09 46119.86 1 1 2 36 56 impossible impossible impossible 2 1

 Ավելացրեց. Հրանտ Հովհաննիսյան Ամսաթիվ. 2014-01-08 Ժամանակի սահմանափակումը. 1s Ծրագրի տեքստի սահմանափակումը. 50000B Memory limit: 1536MB Cluster: Cube (Intel G860) Լեզուներ. Բոլորը բացի ASM32 ASM64 GAWK CLPS CLOJURE D ERL FSHARP FORTRAN GOSU HASK ICON ICK NEM NIM OBJC-CLANG PICO PIKE PYPY PY_NBC RUST SCM guile CHICKEN SED TCL WHITESPACE Աղբյուրը. NA Rocky Mountain 2013.E