Submission #202319

#	Time	Username	Problem	Language	Result	Execution time	Memory
202319		errorgorn	자리 배치 (IOI18_seats)	C++14	11 / 100	4062 ms	41224 KiB

seats

#include "seats.h"
#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> ii;

int h,w;
ii pos[1000005];

void give_initial_chart(int H, int W, std::vector<int> R, std::vector<int> C) {
	h=H,w=W;
	for (int x=0;x<h*w;x++){
		pos[x]=ii(R[x],C[x]);
	}
	
	//print();
}

int swap_seats(int a, int b) {
	swap(pos[a],pos[b]);

	//print();
	
	int x1,x2,y1,y2;
	x1=x2=pos[0].first;
	y1=y2=pos[0].second;
	
	int s=1;
	int biggest=0;
	int res=1;
	for (int x=1;x<h*w;x++){
		while (pos[x].first<x1){
			x1--;
			s+=y2-y1+1;
		}
		while (x2<pos[x].first){
			x2++;
			s+=y2-y1+1;
		}
		while (pos[x].second<y1){
			y1--;
			s+=x2-x1+1;
		}
		while (y2<pos[x].second){
			y2++;
			s+=x2-x1+1;
		}
		if (s==x+1) res++;
	}
	
	return res;
}

Compilation message (stderr)

seats.cpp: In function 'int swap_seats(int, int)':
seats.cpp:28:6: warning: unused variable 'biggest' [-Wunused-variable]
  int biggest=0;
      ^~~~~~~

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