Submission #754997

#	Time	Username	Problem	Language	Result	Execution time	Memory
754997		DJeniUp	Aliens (IOI16_aliens)	C++17	0 / 100	1 ms	340 KiB

aliens

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

using namespace std;

typedef long long ll;
typedef pair<ll,ll>pairll;

#define N 100007
#define fr first
#define sc second

ll h,nl[2*N],nr[2*N],pr[2*N],nx[2*N],p;

struct D{
    ll l,tp;
}d[2*N];

bool mcp(D d1, D d2){
    if(d1.l!=d2.l)return d1.l<d2.l;
    return d1.tp>d2.tp;
}
ll S(ll x,ll y){
    return (nr[y]-nl[x]+1)*(nr[y]-nl[x]+1)-(nr[y]-nl[y]+1)*(nr[y]-nl[y]+1)-(nr[x]-nl[x]+1)*(nr[x]-nl[x]+1);
}

priority_queue<pairll,vector<pairll>, greater<pairll> >q;

long long take_photos(int n, int m, int k, std::vector<int> r, std::vector<int> c) {
    for(int i=0;i<n;i++){
        ll x=0;
        ll y=0;
        x=min(r[i],c[i]);
        y=max(r[i],c[i]);
        h++;
        d[h]={x,1};
        h++;
        d[h]={y,-1};
    }
    sort(d+1,d+1+h,mcp);
    ll x=0;
    for(int i=1;i<=h;i++){
        if(x==0){
            p++;
            nl[p]=d[i].l;
        }
        nr[p]=d[i].l;
        x+=d[i].tp;
    }
    ll res=0;
    for(int i=1;i<=p;i++){
        res+=(nr[i]-nl[i]+1)*(nr[i]-nl[i]+1);
        pr[i]=i-1;
        nx[i]=i+1;
        if(i!=1)q.push({S(i-1,i),i-1});
    }
    for(int i=1;i<=p-k;i++){
        while(q.size()>0 && q.top().fr!=S(q.top().sc,nx[q.top().sc]))q.pop();
        res+=q.top().fr;
        ll m1=q.top().sc;
        nr[m1]=nr[nx[m1]];
        nx[m1]=nx[nx[m1]];
        if(nx[m1]!=0 && nx[m1]!=p+1){
            q.push({S(m1,nx[m1]),m1});
        }
        if(pr[m1]!=0){
            q.push({S(pr[m1],m1),pr[m1]});
        }
    }
    
    
    return res;
}

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