Submission #972857

#	Time	Username	Problem	Language	Result	Execution time	Memory
972857		sleepntsheep	Wall (IOI14_wall)	C11	100 / 100	711 ms	102480 KiB

wall

#include "wall.h"

#define MAX_N 4000002

int lo(int a,int b){return a>b?b:a;}
int hi(int a,int b){return a<b?b:a;}

int min[MAX_N<<2], max[MAX_N<<2];

void apply(int v,int kl,int kh)
{
    min[v]=hi(kh,lo(min[v],kl));
    max[v]=hi(kh,lo(max[v],kl));
}

void push(int v,int l,int r)
{
    apply(v<<1,min[v],max[v]);
    apply(v<<1|1,min[v],max[v]);
    if(l!=r) min[v]=1e9,max[v]=-1e9;
}

void upd(int v,int l,int r,int x,int y,int kl,int kh)
{
    push(v,l,r);
    if(r<x||y<l)return;
    if(x<=l&&r<=y){apply(v,kl,kh);return;}
    upd(v<<1,l,l+(r-l)/2,x,y,kl,kh),upd(v<<1|1,l+(r-l)/2+1,r,x,y,kl,kh);
}

void build(int v,int l,int r)
{
    if(l==r)min[v]=max[v]=0;
    else build(v<<1,l,l+(r-l)/2),build(v<<1|1,l+(r-l)/2+1,r);
}

void ans(int v,int l,int r,int *o)
{
    push(v,l,r);
    if(l==r){o[l]=min[v];return;}
    ans(v<<1,l,l+(r-l)/2,o),ans(v<<1|1,l+(r-l)/2+1,r,o);
}

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
    build(1,0,n-1);
    for(int i=0;i<k;++i) upd(1,0,n-1,left[i],right[i],op[i]==1?1e9:height[i],op[i]==2?-1e9:height[i]);
    ans(1,0,n-1,finalHeight);
}

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