Submission #431472

#	Time	Username	Problem	Language	Result	Execution time	Memory
431472		Bench0310	Seats (IOI18_seats)	C++17	17 / 100	4081 ms	55460 KiB

seats

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

using namespace std;
typedef long long ll;

int n,h,w;
vector<array<int,2>> v;
vector<int> ar,br,ac,bc;
int res=0;

int ok(int i){return ((br[i]-ar[i]+1)*(bc[i]-ac[i]+1)==i+1);}

void give_initial_chart(int nh,int nw,vector<int> r,vector<int> c)
{
    h=nh;
    w=nw;
    n=h*w;
    v.assign(n,{0,0});
    for(int i=0;i<n;i++) v[i]={r[i],c[i]};
    ar.assign(n,v[0][0]);
    br.assign(n,v[0][0]);
    ac.assign(n,v[0][1]);
    bc.assign(n,v[0][1]);
    res=ok(0);
    for(int i=1;i<n;i++)
    {
        ar[i]=min(ar[i-1],v[i][0]);
        br[i]=max(br[i-1],v[i][0]);
        ac[i]=min(ac[i-1],v[i][1]);
        bc[i]=max(bc[i-1],v[i][1]);
        res+=ok(i);
    }
}

int swap_seats(int a,int b)
{
    if(a>b) swap(a,b);
    swap(v[a],v[b]);
    for(int i=a;i<=b;i++)
    {
        res-=ok(i);
        ar[i]=min((i>0?ar[i-1]:n),v[i][0]);
        br[i]=max((i>0?br[i-1]:0),v[i][0]);
        ac[i]=min((i>0?ac[i-1]:n),v[i][1]);
        bc[i]=max((i>0?bc[i-1]:0),v[i][1]);
        res+=ok(i);
    }
    return res;
}

//int main()
//{
//    
//    return 0;
//}

• Subtask 1: 5 / 5
• Subtask 2: 6 / 6
• Subtask 3: 0 / 20
• Subtask 4: 6 / 6
• Subtask 5: 0 / 33
• Subtask 6: 0 / 30