#include "robots.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
ll w,h;
vector<vector<ll>> grid;
bool success(ll mid){
vector<vector<ll>> dp(2,vector<ll>(w+1,0));
for (ll i = w-1; i>=0; i--){
dp[0][i]=mid*(w-1-i);
}
bool c = 1;
for (ll y = h-1; y>=0; y--){
dp[c][w]=mid*(h-1-y);
for (ll x = w-1; x>=0; x--){
dp[c][x]=dp[c][x+1]+dp[!c][x]-dp[!c][x+1]-grid[x][y];
if (dp[c][x]<0){
return false;
}
}
c=!c;
}
return true;
}
int putaway(int lx, int ly, int n, int xpos[], int ypos[], int xtoys[], int ytoys[]) {
sort(xpos,xpos+lx);
sort(ypos,ypos+ly);
for (ll i = 0; i<n; i++){
xtoys[i]=upper_bound(xpos,xpos+lx,xtoys[i])-xpos;
ytoys[i]=upper_bound(ypos,ypos+ly,ytoys[i])-ypos;
}
w=lx+1;
h=ly+1;
grid.resize(w,vector<ll>(h,0));
for (ll i = 0; i<n; i++){
grid[xtoys[i]][ytoys[i]]++;
}
if (grid[w-1][h-1]>0){
return -1;
}
ll l = 0, r = n;
while (l<=r){
ll mid = (l+r)/2;;
if (success(mid)){
r=mid-1;
} else {
l=mid+1;
}
}
return l;
}
