Problem:


Score : 900 points

Problem Statement

You are in charge of controlling a dam. The dam can store at most L liters of water. Initially, the dam is empty. Some amount of water flows into the dam every morning, and any amount of water may be discharged every night, but this amount needs to be set so that no water overflows the dam the next morning.

It is known that v_i liters of water at t_i degrees Celsius will flow into the dam on the morning of the i-th day.
You are wondering about the maximum possible temperature of water in the dam at noon of each day, under the condition that there needs to be exactly L liters of water in the dam at that time. For each i, find the maximum possible temperature of water in the dam at noon of the i-th day. Here, consider each maximization separately, that is, the amount of water discharged for the maximization of the temperature on the i-th day, may be different from the amount of water discharged for the maximization of the temperature on the j-th day (j≠i).

Also, assume that the temperature of water is not affected by anything but new water that flows into the dam. That is, when V_1 liters of water at T_1 degrees Celsius and V_2 liters of water at T_2 degrees Celsius are mixed together, they will become V_1+V_2 liters of water at \frac{T_1*V_1+T_2*V_2}{V_1+V_2} degrees Celsius, and the volume and temperature of water are not affected by any other factors.

Constraints

1≤ N ≤ 5*10^5

1≤ L ≤ 10^9

0≤ t_i ≤ 10^9(1≤i≤N)

1≤ v_i ≤ L(1≤i≤N)

v_1 = L

L, each t_i and v_i are integers.

Input

Input is given from Standard Input in the following format:

N L
t_1 v_1
t_2 v_2
:
t_N v_N

Output

Print N lines. The i-th line should contain the maximum temperature such that it is possible to store L liters of water at that temperature in the dam at noon of the i-th day.

Each of these values is accepted if the absolute or relative error is at most 10^{-6}.

Sample Input 1

3 10
10 10
20 5
4 3

Sample Output 1

10.0000000
15.0000000
13.2000000

On the first day, the temperature of water in the dam is always 10 degrees: the temperature of the only water that flows into the dam on the first day.

10 liters of water at 15 degrees of Celsius can be stored on the second day, by discharging 5 liters of water on the night of the first day, and mix the remaining water with the water that flows into the dam on the second day.

10 liters of water at 13.2 degrees of Celsius can be stored on the third day, by discharging 8 liters of water on the night of the first day, and mix the remaining water with the water that flows into the dam on the second and third days.

Sample Input 2

4 15
0 15
2 5
3 6
4 4

Sample Output 2

0.0000000
0.6666667
1.8666667
2.9333333

Sample Input 3

4 15
1000000000 15
9 5
8 6
7 4

Sample Output 3

1000000000.0000000
666666669.6666666
400000005.0000000
293333338.8666667

Although the temperature of water may exceed 100 degrees Celsius, we assume that water does not vaporize.



Sample input:
3 10
10 10
20 5
4 3


Sample output:
10.0000000
15.0000000
13.2000000

Submission status: Runtime Error

Solution code:
# F
import numpy as np
from collections import deque
 
TT_list = []
# input
N, L = map(int, input().split())
T = 0.0
vt_now = 0.0
v_now = 0
que = deque()

for i in range(N):
    ti, v = map(int, input().split())
    t = float(ti)
    v_now += v
    vt_now += v*t
    # add
    if v == L:
        que.append([t, v])
    else:
        while v < L and len(que) > 0:
            t_, v_ = que.pop()
            if t_ <= t:
                que.append([t_, v_])
                que.append([t, v])
                break
            elif v + v_ >= L:
                v_ = v + v_ - L
                t = ((L - v) * t_ + v * t) / L
                v = L
                que = deque([t, v])
                v_now = L
                vt_now = v*L
                # break
            else:
                t = (t*v + t_*v_) / (v + v_)
                v = v + v_
    # minus
    while v_now > L:
        if que[0][1] <= v_now - L:
            v_now -= que[0][1]
            vt_now -= que[0][1]*que[0][0]
            que.popleft()
        else:
            que[0][1] -= v_now - L
            vt_now -= (v_now - L)*que[0][0]
            v_now = L
            
    TT_list.append(vt_now / L)

for i in range(N):
    print(TT_list[i])

Submission status: Runtime Error

Solution code:
# F
import numpy as np
from collections import deque
 
TT_list = []
# input
N, L = map(int, input().split())
T = 0.0
vt_now = 0.0
v_now = 0
que = deque()

for i in range(N):
    ti, v = map(int, input().split())
    t = float(ti)
    v_now += v
    vt_now += v*t
    # add
    if v == L:
        que.deque([t, v])
    else:
        while v < L and len(que) > 0:
            t_, v_ = que[-1]
            if t_ <= t:
                que.append([t, v])
                break
            elif v + v_ > L:
                v_ = v + v_ - L
                t = ((L - v) * t_ + v * t) / L
                v = L
                que = deque([[t, v]])
                v_now = L
                vt_now = t*L
                # break
            else:
                t = (t*v + t_*v_) / (v + v_)
                v = v + v_
                if v == L:
                    que = deque([[t, v]])
                    v_now = L
                    vt_now = t*L
                else:
                    que.pop()
    # minus
    while v_now > L:
        if que[0][1] <= v_now - L:
            v_now -= que[0][1]
            vt_now -= que[0][1]*que[0][0]
            que.popleft()
        else:
            que[0][1] -= v_now - L
            vt_now -= (v_now - L)*que[0][0]
            v_now = L
            
            
    TT_list.append(vt_now / L)

for i in range(N):
    print(TT_list[i])

Submission status: Runtime Error

Solution code:
#include <iostream>
#include <cstdio>
#include <algorithm>
#include <cmath>
#include <map>
#include <vector>
#include <cstring>
#include <deque>
using namespace std;
typedef long long ll;
int main()
{
    //freopen("input.in", "r", stdin);
    ll N, L;
    while(cin>>N>>L){
        deque<pair<ll, ll>> dp;
        vector<ll> T(N, 0), V(N, 0);
        for(int i=0;i<N;i++){
            cin>>T[i]>>V[i];
        }
        ll tt=0, vv=0;
        for(int i=0;i<N;i++){
            ll t=T[i]*V[i], v=V[i];
            while(vv+v>L){
               ll t1=dp[0].first, v1=dp[0].second;
               ll tmp=min(vv+v-L, v1);
               tt=tt-t1*tmp/v1;
               vv-=tmp;
               if(tmp==v1){
                   dp.pop_front();
               }
               else{
                   dp[0].first=t1-t1*tmp/v1;
                   dp[0].second=v1-tmp;
               }
            }

            tt+=t;
            vv=L;
            printf("%.7lf\n", (double)tt/vv);
            int ans=dp.size();
            ll c1=t;
            ll c2=v;
            while(ans){
                ll t2=dp[ans-1].first, v2=dp[ans-1].second;
                if(t2/v2<c1/c2){
                    break;
                }
                else{
                    c1+=t2;
                    c2+=v2;
                    dp.pop_back();
                }
                ans=dp.size();
            }
            dp.push_back(make_pair(c1, c2));
        }
    }
    return 0;
}

Submission status: Runtime Error

Solution code:
from collections import deque

N,L = list(map(int,input().split()))

List = []
########################################

result = ""

t1,v1 = map(int,input().split())

d = deque( [(t1,v1)] )
netsuryou = t1*v1

res += str(t1) + "\n"

for t,v in [ map(int,input().split()) for _ in range(N-1) ]:
	
	netsuryou += t*v

	#右端からvリットル減らす
	l = v
	while(l > 0):
		migihasi_t,migihasi_v = d.pop()
		if migihasi_v > l:
			netsuryou -= migihasi_t*l
			d.append( ( migihasi_t,migihasi_v-l ) )
			break
		else:
			l = l - migihasi_v
			netsuryou -= migihasi_t*migihasi_v

	#答えを表示
	res += str(netsuryou / L) + "\n"

	#左のほうが温度が低ければ2つを合成
	new_t,new_v = t,v
	while(True):

		if len(d) == 0:
			d.appendleft( (new_t,new_v) )
			break

		hidarihasi_t,hidarihasi_v = d.popleft()

		#条件を満たすならループを抜ける
		if new_t >= hidarihasi_t:
			d.appendleft( (hidarihasi_t,hidarihasi_v) )
			d.appendleft( (new_t,new_v) )
			break

		new_v = new_v + hidarihasi_v
		new_t = (new_t*new_v + hidarihasi_t*hidarihasi_v) / new_v

print (res)

Submission status: Runtime Error

Solution code:
temp=input().split()
N=int(temp[0])
L=int(temp[1])
t=[]
v=[]
throw=0#amount of throw water
index=0

for I in range(N):
	temp=input().split()
	t+=[int(temp[0])]
	v+=[int(temp[1])]
	
	if I==0:
		print(t[0])
		continue
	
	throw=v[I]
	while True:
		coldTemp=min(t[:-1])
		coldIndex=t.index(coldTemp)
		if throw<v[coldIndex]:
			v[coldIndex]-=throw
			break
		else:
			throw-=v[coldIndex]
			del v[coldIndex]
			del t[coldIndex]
			
	ans=0
	for i in range(len(t)):
		ans+=t[i]*v[i]
	print(ans/L)