Solving equations of upper triangular matrices

Suppose you have an equation like with and . and are given and you want to solve for . Example With , the problem could look like this: This is only a shorthand for: First step: Solve for First you see that . So you divide by the current row. Don’t divide through 0. When [...]

Solving equations of lower unitriangular matrices

Suppose you have an equation like with and . and are given and you want to solve for . Example With , the problem could look like this: This is only a shorthand for: This is easy to solve, isn’t it? First step: Solve for First you see that . Now you replace every occurence [...]

Google Code Jam – Round 1B 2013

Problem A (Osmos): Small Set: 4668/7250 users (64%) Large Set: 3537/4578 users (77%) Problem B (Falling Diamonds): Small Set: 952/1882 users (51%) Large Set: 525/724 users (73%) Problem C (Garbled Email): Small Set: 444/896 users (50%) Large Set: 255/345 users (74%) More information are on go-hero.net. Osmos Falling Diamonds Oncee you’ve read the task, you [...]

Google Code Jam – Round 1A 2013

Problem A (Bullseye): Small Set: 5856/6195 users (95%) Large Set: 1806/4795 users (38%) Problem B (Manage your Energy): Small Set: 2323/3789 users (61%) Large Set: 456/1133 users (40%) Problem C (Good Luck): Small Set: 1366/1774 users (77%) Large Set: 31/605 users (5%) More information might soon be on go-hero.net. I’m too slow for Google Code [...]