Submission #125178

#	Time	Username	Problem	Language	Result	Execution time	Memory
125178		chubyxdxd	Seats (IOI18_seats)	C++11	0 / 100	358 ms	39636 KiB

seats

#include "seats.h"
#include <bits/stdc++.h>
using namespace std;
#define pb push_back
std::vector<int> r;
std::vector<int> c;
typedef pair<int,int> ii;
vector<int> vmaxx;
vector<int> vmaxy;
vector<int> vminy;
vector<int> vminx;
int  g=0,e,d;
void give_initial_chart(int H, int W, std::vector<int> R, std::vector<int> C) {
  r = R;
  c = C;
  int maxx=r[0],minx=r[0],maxy=c[0],miny=c[0]; 
  for(int i=0;i<H*W;i++){
  	int x1,y1;
  	x1=r[i];
  	y1=c[i];
  	maxx=max(maxx,x1);
  	minx=min(minx,x1);
  	maxy=max(maxy,y1);
  	miny=min(miny,y1);
  	d=abs(maxx-minx)+1;
  	e=abs(maxy-miny)+1;
  	if(d*e==i+1){
  		g++;
  	}
  	vmaxx.pb(maxx);
  	vmaxy.pb(maxy);
  	vminx.pb(minx);
  	vminy.pb(miny);
  }
  //cout<<g<<endl;
}
int swap_seats(int a, int b) {
  int x1,y1;
  //int x2,y2;
  swap(r[a],r[b]);
  swap(c[a],c[b]);
  if(abs(a-b)<=10000){
  	int j=min(a,b);
  	int k=max(a,b);
  	for(int i=j;i<=k;i++){
  		d=abs(vmaxx[i]-vminx[i])+1;
  		e=abs(vmaxy[i]-vminy[i])+1;
  		if(e*d==i+1){
  			g--;
  		}
  	}
  	int maxx=r[j],minx=r[j],maxy=c[j],miny=c[j];
  	for(int i=j;i<=k;i++){
  		x1=r[i];
  		y1=c[i];
  		maxx=max(maxx,x1);
  		minx=min(minx,x1);
  		maxy=max(maxy,y1);
  		miny=min(miny,y1);
  		vmaxx[i]=maxx;
  		vmaxy[i]=maxy;
  		vminx[i]=minx;
  		vminy[i]=miny;
  		d=abs(vmaxx[i]-vminx[i])+1;
  		e=abs(vmaxy[i]-vminy[i])+1;
  		if(e*d==i+1){
  			g++;
  		}
  	}
  	return g;
  }
}

Compilation message (stderr)

seats.cpp: In function 'int swap_seats(int, int)':
seats.cpp:72:1: warning: control reaches end of non-void function [-Wreturn-type]
 }
 ^

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