Submission #65485

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
65485	2018-08-07T17:48:09 Z	theknife2001	Wall (IOI14_wall)	C++17	Compilation error	0 ms	0 KB

wall

#include "wall.h"
#include <bits/stdc++.h>
#define mid (l+r)/2

const int N=2e6+55;
int lazy[N*4];
int tree[N*4];

void propagate(int l , int r , int node)
{
    if(lazy[node]==0)
        return ;
    tree[node]+=lazy[node];
    tree[node]=max(0,tree[node]);
    if(l!=r)
    {
        lazy[node*2]+=lazy[node];
        lazy[node*2+1]+=lazy[node];
    }
    lazy[node]=0;
}

void update(int l , int r , int node , int x , int y , int val)
{
    propagate(l,r,node);
    if(r<x||l>y)
        return ;
    if(x<=l&&r<=y)
    {
        lazy[node]+=val;
        propagate(l,r,node);
        return ;
    }
    update(l,mid,node*2,x,y,val);
    update(mid+1,r,node*2+1,x,y,val);
}

int query(int l , int r , int node , int ind)
{
    propagate(l,r,node);
    if(l==r&&l==ind)
        return tree[node];
    if(ind<=mid)
        return query(l,mid,node*2,ind);
    else
        return query(mid+1,r,node*2+1,ind);
}

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[])
{
    for(int i=0;i<k;i++)
    {
        if(op[i]==2)
            height[i]*=-1;
        update(0,n-1,1,right[i],left[i],height[i]);
    }
    for(int i=0;i<n;i++)
        finalHeight[i]=query(0,n-1,1,i);
}

Compilation message

wall.cpp: In function 'void propagate(int, int, int)':
wall.cpp:14:16: error: 'max' was not declared in this scope
     tree[node]=max(0,tree[node]);
                ^~~
wall.cpp:14:16: note: suggested alternative:
In file included from /usr/include/c++/7/algorithm:62:0,
                 from /usr/include/x86_64-linux-gnu/c++/7/bits/stdc++.h:65,
                 from wall.cpp:2:
/usr/include/c++/7/bits/stl_algo.h:3468:5: note:   'std::max'
     max(initializer_list<_Tp> __l, _Compare __comp)
     ^~~