By Elevator or Stairs? --------CodeForces - 1249E

You are planning to buy an apartment in a n -floor building. The floors are numbered from 1 to n from the bottom to the top. At first for each floor you want to know the minimum total time to reach it from the first (the bottom) floor.

Let:

• ai for all i from 1 to n−1 be the time required to go from the i -th floor to the (i+1) -th one (and from the (i+1) -th to the i -th as well) using the stairs;
• bi for all i from 1 to n−1 be the time r equired to go from the ii -th floor to the (i+1) -th one (and from the (i+1) -th to the i-th as well) using the elevator, also there is a value cc — time overhead for elevator usage (you need to wait for it, the elevator doors are too slow!).

In one move, you can go from the floor you are staying at xx to any floor y （x≠y ) in two different ways:

• If you are using the stairs, just sum up the corresponding values of aiai . Formally, it will take ∑i=min(x,y)max(x,y)−1ai time units.
• If you are using the elevator, just sum up c and the corresponding values of bi . Formally, it will take c+∑i=min(x,y)max(x,y)−1bi time units.

You can perform as many moves as you want (possibly zero).

So your task is for each i to determine the minimum total time it takes to reach the i -th floor from the 1 -st (bottom) floor.

Input

The first line of the input contains two integers n and c (2≤n≤2⋅105,1≤c≤1000 ) — the number of floors in the building and the time overhead for the elevator rides.

The second line of the input contains n−1 integers a1,a2,…,an−1 (1≤ai≤1000 ), where aiai is the time required to go from the i -th floor to the (i+1) -th one (and from the (i+1) -th to the i -th as well) using the stairs.

The third line of the input contains n−1 integers b1,b2,…,bn−1 (1≤bi≤1000 ), where bi is the time required to go from the i -th floor to the (i+1) -th one (and from the (i+1) -th to the i -th as well) using the elevator.

Output

Print nn integers t1,t2,…,tn , where titi is the minimum total time to reach the i -th floor from the first floor if you can perform as many moves as you want.

Examples

Input

10 2
7 6 18 6 16 18 1 17 17
6 9 3 10 9 1 10 1 5

Output

0 7 13 18 24 35 36 37 40 45 

Input

10 1
3 2 3 1 3 3 1 4 1
1 2 3 4 4 1 2 1 3

Output

0 2 4 7 8 11 13 14 16 17 

 

題目大意：你現在所處位置在1樓，給出你兩組數據，第一組爲從i到i+1走樓梯所需要的時間，第二組爲從i到i+1坐電梯所需要的時間，從走樓梯轉向電梯需要等c時間。

思路：動態規劃。

dp[i][j]: i爲現在所在第幾樓，j表示到達 i 現在的位置從 i-1  是走樓梯還是電梯。設0爲電梯，1爲樓梯。

#include<stdio.h>
#include<string.h>
#include<iostream>
#include<algorithm>
using namespace std;
long long a[200010],b[200010];
int dp[200010][2];
int main()
{
    int n,c;
    while(~scanf("%d%d",&n,&c))
    {
        memset(dp,0,sizeof(dp));
        for(int i=1;i<n;i++)
            scanf("%d",&a[i]);
        for(int i=1;i<n;i++)
            scanf("%d",&b[i]);
        dp[0][0]=0;//樓
        dp[0][1]=c;//電
        printf("0");
        for(int i=1;i<n;i++)
        {
            dp[i][0]=min(dp[i-1][0]+a[i],dp[i-1][1]+b[i]);
            dp[i][1]=min(dp[i-1][0]+c+a[i],dp[i-1][1]+b[i]);
            printf(" %d",min(dp[i][0],dp[i][1]));
        }
       printf("\n");
    }
    return 0;
}