Submission #719728

#	Time	Username	Problem	Language	Result	Execution time	Memory
719728		Boomyday	Balloons (CEOI11_bal)	Pypy 3	100 / 100	886 ms	42508 KiB

bal

from collections import deque

n = int(input())

x, r = [], []



def getrj(ri, xi, xj):
    return (xj-xi)/(4*ri)*(xj-xi)

assert (getrj(9, 0, 13)) - 4.694 <= 0.001


for i in range(n):
    xi, ri = map(int, input().split())
    x.append(xi)
    r.append(ri)






st = deque()
r2 = []

for bal in range(n):
    mn = r[bal]
    while st:
        tp = st.pop()
        mn = min(mn, getrj(r2[tp], x[tp], x[bal]))
        if mn >= r2[tp]:
            continue
        else:
            st.append(tp)
            break

    st.append(bal)




    print(mn)
    r2.append(mn)

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10