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| int impl(string str) | |
| { | |
| var sum = 0; | |
| var last = 0; | |
| for (int i=0; i < str.Length; i++) | |
| { | |
| var val = values[ str[i] ]; | |
| sum += val; | |
| if (i > 0 && last < val) | |
| sum -= 2 * last; | |
| last = val; | |
| } | |
| return sum; | |
| } | |
| //bonus: functional-style C# using LINQ | |
| inp => (" " + inp) | |
| .Zip(inp, (pc, c) => new[] {pc != ' ' ? values[pc] : 0, values[c] }) | |
| .Sum(x => x[1] - 2 * ( x[0] < x [1] ? x[0] : 0 ) ) |
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