Submission #838493

#	Time	Username	Problem	Language	Result	Execution time	Memory
838493		Andrey	Wall (IOI14_wall)	C++14	100 / 100	537 ms	132224 KiB

wall

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

vector<pair<int,int>> seg(3000000,{0,INT_MAX});
vector<pair<pair<int,int>,int>> haha[2000000];

void upd(int l, int r, int x, int p, int y, int a) {
    if(l == r) {
        if(y == 0) {
            seg[x] = {a,seg[x].second};
        }
        else {
            seg[x] = {seg[x].first,a};
        }
        return;
    }
    int m = (l+r)/2;
    if(p <= m) {
        upd(l,m,x*2+1,p,y,a);
    }
    else {
        upd(m+1,r,x*2+2,p,y,a);
    }
    if(seg[x*2+2].first >= seg[x*2+1].second) {
        seg[x] = {min(seg[x*2+2].first,seg[x*2+2].second),min(seg[x*2+2].first,seg[x*2+2].second)};
    }
    else {
        seg[x] = {max(seg[x*2+1].first,seg[x*2+2].first),min(seg[x*2+1].second,seg[x*2+2].second)};
    }
}

void buildWall(int n, int k, int op[], int left[], int right[], int height[], int finalHeight[]){
    for(int i = 0; i < k; i++) {
        haha[left[i]].push_back({{i,op[i]-1},height[i]});
        int c = 0;
        if(op[i] == 2) {
            c = INT_MAX;
        }
        haha[right[i]+1].push_back({{i,op[i]-1},c});
    }
    for(int i = 0; i < n; i++) {
        for(int j = 0; j < haha[i].size(); j++) {
            upd(0,k-1,0,haha[i][j].first.first,haha[i][j].first.second,haha[i][j].second);
        }
        finalHeight[i] = min(seg[0].first,seg[0].second);
    }
}

Compilation message (stderr)

wall.cpp: In function 'void buildWall(int, int, int*, int*, int*, int*, int*)':
wall.cpp:43:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<std::pair<int, int>, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |         for(int j = 0; j < haha[i].size(); j++) {
      |                        ~~^~~~~~~~~~~~~~~~

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