Submission #837934

#	Time	Username	Problem	Language	Result	Execution time	Memory
837934		FulopMate	Seats (IOI18_seats)	C++17	17 / 100	4070 ms	55624 KiB

seats

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

using namespace std;

int n;
vector<pair<int,int>> v;
vector<int> a, b, c, d;
vector<bool> lehet;
int ans;

void give_initial_chart(int H, int W, vector<int> R, vector<int> C) {
    n = H*W;
    v.resize(n);
    a.resize(n); b.resize(n);
    c.resize(n); d.resize(n);
    lehet.resize(n);
    for(int i = 0; i < n; i++){
        v[i] = {R[i], C[i]};
    }

    int ca = v[0].first, cb = v[0].first, cc = v[0].second, cd = v[0].second;
    a[0] = ca, b[0] = cb, c[0] = cc, d[0] = cd;
    lehet[0] = 1;
    ans = 1;
    for(int i = 1; i < n; i++){
        ca = min(ca, v[i].first);
        cb = max(cb, v[i].first);
        cc = min(cc, v[i].second);
        cd = max(cd, v[i].second);
        if(i+1 == (cb-ca+1)*(cd-cc+1)){
            lehet[i] = true;
            ans++;
        }
        a[i] = ca, b[i] = cb, c[i] = cc, d[i] = cd;
    }
}

int swap_seats(int x, int y) {
    swap(v[x], v[y]);
    if(x > y)swap(x, y);
    int ca, cb, cc, cd;
    if(x == 0){
        ca = v[0].first; cb = v[0].first;
        cc = v[0].second; cd = v[0].second;
    } else {
        ca = a[x-1]; cb = b[x-1];
        cc = c[x-1]; cd = d[x-1];
    }
    for(int i = x; i <= y; i++){
        ca = min(ca, v[i].first);
        cb = max(cb, v[i].first);
        cc = min(cc, v[i].second);
        cd = max(cd, v[i].second);
        if(i+1 == (cb-ca+1)*(cd-cc+1)){
            if(!lehet[i]){
                lehet[i] = true;
                ans++;
            }
        } else {
            if(lehet[i]){
                lehet[i] = false;
                ans--;
            }
        }
        a[i] = ca, b[i] = cb, c[i] = cc, d[i] = cd;
    }
    return ans;
}

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