Submission #1873888


Source Code Expand

def func(n, k, wp, y, x)
  n.times{|i|
    w, p = wp[i]
    y[i] = w * (p - x)
  }
  
  y.sort!.reverse!
  
  sum = 0
  k.times{|i|
    sum += y[i]
  }
  
  return sum >= 0
end


n,k = gets.split.map &:to_i
wp = n.times.map{w,p = gets.split.map &:to_i}

ok = 0.0
ng = 100.0
y = Array.new(n, 0.0)

for i in 0..100
  mid = (ok + ng)/2
  if func(n, k, wp, y, mid) then
    ok = mid
  else
    ng = mid
  end
end

p ng

Submission Info

Submission Time
Task D - 食塩水
User sca1l
Language Ruby (2.3.3)
Score 100
Code Size 447 Byte
Status AC
Exec Time 79 ms
Memory 1788 KB

Compile Error

./Main.rb:18: warning: `&' interpreted as argument prefix
./Main.rb:19: warning: `&' interpreted as argument prefix
./Main.rb:19: warning: assigned but unused variable - w
./Main.rb:19: warning: assigned but unused variable - p
./Main.rb:25: warning: assigned but unused variable - i

Judge Result

Set Name Sample All
Score / Max Score 0 / 0 100 / 100
Status
AC × 2
AC × 22
Set Name Test Cases
Sample s0.txt, s1.txt
All 000.txt, 001.txt, 002.txt, 003.txt, 004.txt, 005.txt, 006.txt, 007.txt, 008.txt, 009.txt, 010.txt, 011.txt, 012.txt, 013.txt, 014.txt, 015.txt, 016.txt, 017.txt, 018.txt, 019.txt, s0.txt, s1.txt
Case Name Status Exec Time Memory
000.txt AC 77 ms 1788 KB
001.txt AC 13 ms 1788 KB
002.txt AC 74 ms 1788 KB
003.txt AC 24 ms 1788 KB
004.txt AC 78 ms 1788 KB
005.txt AC 76 ms 1788 KB
006.txt AC 73 ms 1788 KB
007.txt AC 64 ms 1788 KB
008.txt AC 79 ms 1788 KB
009.txt AC 13 ms 1788 KB
010.txt AC 77 ms 1788 KB
011.txt AC 41 ms 1788 KB
012.txt AC 79 ms 1788 KB
013.txt AC 36 ms 1788 KB
014.txt AC 79 ms 1788 KB
015.txt AC 61 ms 1788 KB
016.txt AC 76 ms 1788 KB
017.txt AC 52 ms 1788 KB
018.txt AC 74 ms 1788 KB
019.txt AC 57 ms 1788 KB
s0.txt AC 7 ms 1788 KB
s1.txt AC 7 ms 1788 KB