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#include <iostream>
#include <cstdio>
using namespace std;
const int MAXN=100005;
struct Operation
{
    int type,value;
    Operation()
    {
        type=-1;
    }
};
struct Node
{
    int left,right;
    int price;
    Operation operation;
};
int n,m,price[MAXN];
Node node[4*MAXN];
Operation CombineOperation(Operation o1,Operation o2)
{
    if(o1.type==-1)
        return o2;
    if(o2.type==-1)
        return o1;
    if(o2.type==1)
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