Submission #209668

#	Time	Username	Problem	Language	Result	Execution time	Memory
209668		TAISA_	Seats (IOI18_seats)	C++14	17 / 100	4098 ms	55544 KiB

seats

#include "seats.h"
#include <bits/stdc++.h>
using namespace std;
void chmin(int& a,int b){a=min(a,b);}
void chmax(int& a,int b){a=max(a,b);}
vector<int> r,c,xmi,xma,ymi,yma;
int h,w,cnt;
void give_initial_chart(int H, int W, std::vector<int> R, std::vector<int> C) {
	r=R;
	c=C;
	h=H;
	w=W;
	xmi.resize(H*W);
	xma.resize(H*W);
	ymi.resize(H*W);
	yma.resize(H*W);
	xmi[0]=c[0],xma[0]=c[0],ymi[0]=r[0],yma[0]=r[0];
	cnt=1;
	for(int i=1;i<h*w;i++){
		xmi[i]=xmi[i-1],ymi[i]=ymi[i-1],xma[i]=xma[i-1],yma[i]=yma[i-1];
		chmin(xmi[i],c[i]);
		chmin(ymi[i],r[i]);
		chmax(xma[i],c[i]);
		chmax(yma[i],r[i]);
		if((xma[i]-xmi[i]+1)*(yma[i]-ymi[i]+1)==i+1){
			cnt++;
		}
	}
}

int swap_seats(int a, int b) {
	if(a>b)swap(a,b);
	for(int i=a;i<=b;i++){
		if((xma[i]-xmi[i]+1)*(yma[i]-ymi[i]+1)==i+1){
			cnt--;
		}
	}
	swap(r[a],r[b]);
	swap(c[a],c[b]);
	for(int i=a;i<=b;i++){
		if(i>0){
			xmi[i]=xmi[i-1],ymi[i]=ymi[i-1],xma[i]=xma[i-1],yma[i]=yma[i-1];
		}else{
			xmi[0]=c[0],xma[0]=c[0],ymi[0]=r[0],yma[0]=r[0];
		}
		chmin(xmi[i],c[i]);
		chmin(ymi[i],r[i]);
		chmax(xma[i],c[i]);
		chmax(yma[i],r[i]);
		if((xma[i]-xmi[i]+1)*(yma[i]-ymi[i]+1)==i+1){
			cnt++;
		}
	}
	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