oj.uz

Submission #90392

# Submission time Handle Problem Language Result Execution time Memory
90392 2018-12-21T13:19:07 Z Retro3014 Wall (IOI14_wall) C++17
0 / 100
 262 ms 8356 KB 
#include "wall.h"
#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;
#define INF 100000
#define MAX_N 2000000
struct S{
    int l, r;
    int nmin, nmax;
    int from;
};
vector<S> seg;
int ans[MAX_N+1];


void init(int x, int y){
    int idx=(int)seg.size();
    seg.push_back({-1, -1, 0, 0, -1});
    if(x==y){
        return;
    }
    int m=(x+y)/2;
    if(x<=m){
        seg[idx].l=(int)seg.size();
        init(x, m);
        seg[seg[idx].l].from=idx;
    }
    if(m+1<=y){
        seg[idx].r=(int)seg.size();
        init(m+1, y);
        seg[seg[idx].r].from=idx;
    }
    return;
}

void updaten(int x){
    if(seg[x].from!=-1){
        int t=seg[x].from;
        if(seg[t].nmax<seg[x].nmax){
            seg[x].nmax=seg[t].nmax;
        }
        if(seg[t].nmax<seg[x].nmin){
            seg[x].nmin=seg[t].nmax;
        }
        if(seg[t].nmin>seg[x].nmax){
            seg[x].nmax=seg[t].nmin;
        }
        if(seg[t].nmin>seg[x].nmin){
            seg[x].nmin=seg[t].nmin;
        }
    }
    return;
}

void update(int idx, int li, int ri, int data, int nx, int ny){
    //int nx=seg[idx].s, ny=seg[idx].e;
    if(seg[idx].l!=-1){
        updaten(seg[idx].l);
    }
    if(seg[idx].r!=-1){
        updaten(seg[idx].r);
    }
    if(li>ny || ri<nx)  return;
    if(data>0){
        if(seg[idx].nmax<data){
            seg[idx].nmax=data;
        }
    }else{
        data=-data;
        if(seg[idx].nmin>data){
            seg[idx].nmin=data;
        }
        data=-data;
    }
    if(li<=nx && ri>=ny) {
        if(data>0){
            if(seg[idx].nmin<data){
                seg[idx].nmin=data;
            }
        }else{
            data=-data;
            if(seg[idx].nmax>data){
                seg[idx].nmax=data;
            }
            data=-data;
        }
        return;
    }
    if(seg[idx].l!=-1){
        update(seg[idx].l, li, ri, data, nx, (nx+ny)/2);
    }
    if(seg[idx].r!=-1){
        update(seg[idx].r, li, ri, data, (nx+ny)/2+1, ny);
    }
    seg[idx].nmax=max((seg[idx].r==-1?-1:seg[seg[idx].r].nmax), (seg[idx].l==-1?-1:seg[seg[idx].l].nmax));
    seg[idx].nmin=min((seg[idx].r==-1?INF+1:seg[seg[idx].r].nmin), (seg[idx].l==-1?INF+1:seg[seg[idx].l].nmin));
}

void find_ans(int idx, int nx, int ny){
    if(seg[idx].l!=-1){
        updaten(seg[idx].l);
    }
    if(seg[idx].r!=-1){
        updaten(seg[idx].r);
    }
    if(nx==ny){
        ans[nx]=seg[idx].nmax;
        return;
    }
    if(seg[idx].l!=-1){
        find_ans(seg[idx].l, nx, nx+ny);
    }
    if(seg[idx].r!=-1){
        find_ans(seg[idx].r, (nx+ny)+1, ny);
    }
}


void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
    init(0, n-1);
    for(int i=0; i<k; i++){
        if(op[i]==1){
            update(0, left[i], right[i], height[i], 0, n-1);
        }else{
            update(0, left[i], right[i], -height[i], 0, n-1);
        }
    }
    find_ans(0, 0, n-1);
    for(int i=0; i<n; i++){
        finalHeight[i]=ans[i];
    }
  return;
}

Subtask #1
0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 256 KB Output is correct
2 Correct 3 ms 500 KB Output is correct
3 Incorrect 4 ms 500 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 500 KB Output is correct
2 Correct 143 ms 8356 KB Output is correct
3 Incorrect 262 ms 8356 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 29.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8356 KB Output is correct
2 Correct 3 ms 8356 KB Output is correct
3 Incorrect 4 ms 8356 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #4
0 / 39.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 8356 KB Output is correct
2 Correct 3 ms 8356 KB Output is correct
3 Incorrect 3 ms 8356 KB Output isn't correct
4 Halted 0 ms 0 KB -