Submission #1313980

#	Time	Username	Problem	Language	Result	Execution time	Memory
1313980		settop	Aliens (IOI16_aliens)	C++20	4 / 100	4 ms	4152 KiB

aliens

#include "aliens.h"
#include<bits/stdc++.h>

using namespace std;
#include<ext/pb_ds/assoc_container.hpp>
#include<ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;

#define F first
#define S second
#define ll long long
#define ordered_set tree<int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update>
#define fall(i,a,b) for(int i=a;i<=b;i++)
#define rfall(i,a,b) for(int i=a;i>=b;i--)
#define pb push_back
#define all(x) x.begin(),x.end()
#define sz(x) (int)x.size()
const ll inf=1e15;
const int MAXN=505;
typedef pair<ll,ll> pii;

ll sq(ll x){
    return x*x;
}

long long take_photos(int n, int m, int k, std::vector<int> r, std::vector<int> c) {
    vector<bool> z(n,1);
    vector<vector<int>> pref(m+2,vector<int>(m+2));

    fall(i,0,n-1) if(r[i]>c[i]) swap(r[i],c[i]);

    fall(_,1,n-k){
        ll a=0,b=0,mn=inf;
        fall(i,0,n-1){
            if(!z[i]) continue;
            fall(j,i+1,n-1){
                if(!z[j]) continue;
                ll area=sq(max(c[j],c[i])-min(r[i],r[j]))-sq(c[i]-r[i])-sq(c[j]-r[j])-sq(max(0,min(c[i],c[j])-max(r[i],r[j])));
                if(area<mn) mn=area,a=i,b=j;
            }
        }
        z[b]=0;
        c[a]=max(c[a],c[b]),r[a]=min(r[a],r[b]);
    }

    ll ans=0;

    fall(i,0,n-1){
        if(z[i]){
            fall(j,r[i],c[i]) pref[j][r[i]]++,pref[j][c[i]+1]--;
        }
    }

    fall(i,0,m){
        fall(j,0,m){
            if(j) pref[i][j]+=pref[i][j-1];
            ans+=min(1,pref[i][j]);
        }
    }

    return ans;
}

Compilation message (stderr)

aliens.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~
aliens_c.h:1:9: warning: #pragma once in main file
    1 | #pragma once
      |         ^~~~

• Subtask 1: 4 / 4
• Subtask 2: 0 / 12
• Subtask 3: 0 / 9
• Subtask 4: 0 / 16
• Subtask 5: 0 / 19
• Subtask 6: 0 / 40