Submission #1043481

#	Time	Username	Problem	Language	Result	Execution time	Memory
1043481		nisanduu	Wall (IOI14_wall)	C++14	32 / 100	264 ms	32036 KiB

wall

#include "wall.h"
#include <bits/stdc++.h>
using namespace std;

typedef long long ll;
vector<ll> seg,arr,lazy,seg1,lazy1;
class SGT{
    
    public:
        SGT(ll n){
            seg.resize(4*n + 3,0);
            lazy.resize(4*n + 3,0);
        }
        void update(ll l,ll r,ll ind,ll left,ll right,ll val){
            if(lazy[ind]!=0){
                ll am = lazy[ind];
                seg[ind]=max(seg[ind],am);
                if(l!=r){
                    lazy[2*ind+1] = max(lazy[2*ind+1],lazy[ind]);
                    lazy[2*ind+2] = max(lazy[2*ind+2],lazy[ind]);
                }
                lazy[ind]=0;
            }
            if(r<left||l>right) return;
            if(r<=right&&l>=left){
                ll am = val;
                seg[ind]=max(seg[ind],am);
                if(l!=r){
                    lazy[2*ind+1] = max(lazy[2*ind+1],lazy[ind]);
                    lazy[2*ind+2] = max(lazy[2*ind+2],lazy[ind]);
                }
                return;
            }
            ll mid = (l+r)/2;
            update(l,mid,2*ind+1,left,right,val);
            update(mid+1,r,2*ind+2,left,right,val);
            //seg[ind]=max({seg[ind],seg[2*ind+1],seg[2*ind+2]});
        }
};


class SGT2{
    
    public:
        SGT2(ll n){
            seg1.clear();
            lazy1.clear();
            seg1.resize(4*n + 3,1e9);
            lazy1.resize(4*n + 3,1e9);
        }
        void update(ll l,ll r,ll ind,ll left,ll right,ll val){
            if(lazy1[ind]!=1e9){
                ll am = lazy1[ind];
                seg1[ind]=min(seg1[ind],am);
                if(l!=r){
                    lazy1[2*ind+1] = min(lazy1[2*ind+1],lazy1[ind]);
                    lazy1[2*ind+2] = min(lazy1[2*ind+2],lazy1[ind]);
                }
                lazy1[ind]=1e9;
            }
            if(r<left||l>right) return;
            if(r<=right&&l>=left){
                ll am = val;
                seg1[ind]=min(seg1[ind],am);
                if(l!=r){
                    lazy1[2*ind+1] = min(lazy1[2*ind+1],lazy1[ind]);
                    lazy1[2*ind+2] = min(lazy1[2*ind+2],lazy1[ind]);
                }
                return;
            }
            ll mid = (l+r)/2;
            update(l,mid,2*ind+1,left,right,val);
            update(mid+1,r,2*ind+2,left,right,val);
            //seg[ind]=max({seg[ind],seg[2*ind+1],seg[2*ind+2]});
        }
};

void dfs(ll ind,ll l,ll r,ll maxi,int finalHeight[]){
    if(l==r){
        maxi = max({maxi,lazy[ind],seg[ind]});
        finalHeight[l]=max((ll) finalHeight[l],maxi);
        return;
    }
    ll mid = (l+r)/2;
    maxi = max({maxi,lazy[ind],seg[ind]});
    dfs(2*ind+1,l,mid,maxi,finalHeight);
    dfs(2*ind+2,mid+1,r,maxi,finalHeight);
}

void dfs2(ll ind,ll l,ll r,ll maxi,int finalHeight[]){
    if(l==r){
        maxi = min({maxi,lazy1[ind],seg1[ind]});
        finalHeight[l]=min((ll) finalHeight[l],maxi);
        return;
    }
    ll mid = (l+r)/2;
    maxi = min({maxi,lazy1[ind],seg1[ind]});
    dfs2(2*ind+1,l,mid,maxi,finalHeight);
    dfs2(2*ind+2,mid+1,r,maxi,finalHeight);
}

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
    for(int i=0;i<n;i++){
        finalHeight[i]=0;
    }
    if(n<=10000&&k<=5000){
        for(int i=0;i<k;i++){
            int o = op[i];
            for(int j=left[i];j<=right[i];j++){
                if(finalHeight[j]<height[i] && o==1) finalHeight[j] = height[i];
                if(finalHeight[j]>height[i] && o==2) finalHeight[j] = height[i];
            }
        }
        return;
    }
    bool ok=1;
    SGT sg(n);
    SGT2 sg2(n);
    for(int i=0;i<k;i++){
        int o = op[i];
        if(o==1){
            sg.update(0,n-1,0,left[i],right[i],height[i]);
            continue;
        }
        if(o==2 && ok==1){
            ok=0;
        }
        sg2.update(0,n-1,0,left[i],right[i],height[i]);
    }
    dfs(0,0,n-1,0,finalHeight);
    dfs2(0,0,n-1,1e9,finalHeight);
    
  return;
}

• Subtask 1: 8 / 8
• Subtask 2: 24 / 24
• Subtask 3: 0 / 29
• Subtask 4: 0 / 39