The 10th Latvian Olympiad in Informatics

THE 3RD STAGE OF THE 10TH LATVIAN OLYMPIAD IN INFORMATICS
Tests and correct answers

1. "THE VALUE OF AN EXPRESSION"

Tests	Correct answers	Points
`88888888 520`	1	1
`987654321 987654320`	`NEVAR`	1
`1234 1234`	0	2
`25 73`	3	2
`999999999 737`	8	2
`12345678 215`	NEVAR	2
`100 161`	35	2
`64 7`	NEVAR	2
`16 168`	43	3
`631 168`	61	3

2. "THE FOLDED SHEET"

Tests	Correct answers	Points
`5 999 3 3`	`2997.00``0000`	2
`572 572 572 0`	`163592.``000000`	2
`1000 1 775 774`	`999.500``000`	2
`99 33 55 44`	`2359.50``0000`	2
`120 50 80 55`	`4437.50``0000`	2
`200 1000 8 106`	`143268.``004780`	2
`123 1000 114 62`	`88004.2``23420`	2
`1000 107 500 501`	`55880.8``15426`	2
`499 499 31 477`	`130944.``051470`	2
`1000 7 998 2`	`5256.91``3906`	2

3. "THE STRANGE SEQUENCE"

Tests	Correct answers	Points
`19 2`	`49`	1
`12 6`	`75`	1
`11 255`	`81014`	2
`13 504`	`999919`	2
`18 1777`	`4097799`	2
`15 999`	`10077999`	2
`2 9256`	`19909091`	2
`3 9876`	`98018022`	2
`6 6316`	`699999999`	3
`1 9539`	`999999985`	3

4. "CUTTING OUT OF FACTORIALS"

Tests	Correct answers	Points
`5`	`2 5`	2
`7`	`2 3 7 or 2 4 7`	2
`19`	`7 19`	2
`27`	`11 24 or 11 25`	2
`87`	`2 43 87`	2
`98`	`50`	2
`240`	`120 or 121`	2
`363`	`3 179 359 or 4 179 359 or 5 180 359``or` `3 181 362 or``4 181 362 or 2 181 363`	2
`482`	`242`	2
`497`	`248 497`	2

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