Submission #1176307

#	Time	Username	Problem	Language	Result	Execution time	Memory
1176307		Luvidi	Seats (IOI18_seats)	C++20	17 / 100	4094 ms	39960 KiB

seats

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

const int maxnm=1e6;

#define pii pair<int,int>
#define fs first
#define sc second

int n,m,cnt;
vector<int> r,c;
pair<pii,pii> a[maxnm+1];

pair<pii,pii> mrg(pair<pii,pii> p1,pair<pii,pii> p2){
    return {{min(p1.fs.fs,p2.fs.fs),max(p1.fs.sc,p2.fs.sc)},{min(p1.sc.fs,p2.sc.fs),max(p1.sc.sc,p2.sc.sc)}};
}

void give_initial_chart(int H, int W, std::vector<int> R, std::vector<int> C) {
    r=c={0};
    for(int i:R)r.push_back(i);
    for(int i:C)c.push_back(i);
    n=H,m=W;
    a[0]={{1e9,-1e9},{1e9,-1e9}};
    for(int i=1;i<=n*m;i++){
        a[i]=mrg(a[i-1],{{r[i],r[i]},{c[i],c[i]}});
        cnt+=1LL*(a[i].fs.sc-a[i].fs.fs+1)*(a[i].sc.sc-a[i].sc.fs+1)==i;
    }
}

int swap_seats(int x, int y) {
    if(x>y)swap(x,y);
    x++;y++;
    swap(r[x],r[y]);
    swap(c[x],c[y]);
    for(int i=x;i<y;i++){
        cnt-=1LL*(a[i].fs.sc-a[i].fs.fs+1)*(a[i].sc.sc-a[i].sc.fs+1)==i;
        a[i]=mrg(a[i-1],{{r[i],r[i]},{c[i],c[i]}});
        cnt+=1LL*(a[i].fs.sc-a[i].fs.fs+1)*(a[i].sc.sc-a[i].sc.fs+1)==i;
    }
    return cnt;
}

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