giles
0231bb46a6
Some checks failed
Test, Build, and Deploy / test-build-deploy (push) Failing after 28s
Classic trapped-rain-water two-pass DP:
left_max[i] = max(heights[0..i]) (forward sweep)
right_max[i] = max(heights[i..n-1]) (downto sweep)
water = sum over i of (min(left_max[i], right_max[i])
- heights[i])
For [0; 1; 0; 2; 1; 0; 1; 3; 2; 1; 2; 1]: water = 6.
Tests dual sweep (forward + downto), array of running maxes,
inline-if rhs of <- for running-max update (uses iter-236 fix
for <- accepting if/match RHS).
203 baseline programs total.