Created
January 18, 2015 17:56
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MOD=1000000007 | |
def solve a, b | |
#puts "solve #{a} #{b}" | |
return 1 if a == 0 or b == 0 | |
$cache = (a + 1).times.map{[-1] * (b + 1)} unless $cache | |
return $cache[a][b] if $cache[a][b] != -1 | |
r = solve(a, b - 1) | |
r += solve(a - 1, b) if a - 1 > b | |
$cache[a][b] = r | |
end | |
def solve_stress a, b | |
#puts "solve_stress #{a} #{b}" | |
return 1 if a == 0 or b == 0 | |
$cache_stress = (a + 1).times.map{[-1] * (b + 1)} unless $cache_stress | |
return $cache_stress[a][b] if $cache_stress[a][b] != -1 | |
r = 0 | |
if a > b | |
r = solve_stress(b, b) | |
else | |
r = solve_stress(a - 1, b) | |
r += solve_stress(a, b - 1) if b - 1 >= a | |
end | |
$cache_stress[a][b] = r | |
end | |
gets.to_i.times do |i| | |
a,b = gets.split(/-/).map(&:to_i) | |
$cache = $cache_stress = nil | |
puts "Case ##{i + 1}: #{solve(a, b) % MOD} #{solve_stress(a, b) % MOD}" | |
end |
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