Submission #366612

#	Time	Username	Problem	Language	Result	Execution time	Memory
366612		denkendoemeer	Seats (IOI18_seats)	C++14	Compilation error	0 ms	0 KiB

seats

#include "seats.h"
#include<bits/stdc++.h>
using namespace std;
int h,w,ans;
vector<pair<int,int>>v;
vector<int>xmin,xmax,ymin,ymax;
void give_initial_chart(int h2,int w2,vector<int>r,vector<int>c)
{
    h=h2;
    w=w2;
    xmin=ymin=xmax=ymax=vector<int>(h*w);
    int i;
    for(i=0;i<h*w;i++)
        v.push_back({r[i],c[i]});
    xmin[0]=xmax[0]=v[0].first;
    ymin[0]=ymax[0]=v[0].second;
    for(i=1;i<h*w;i++){
        xmin[i]=min(xmin[i-1],v[i].first);
        xmax[i]=max(xmax[i-1],v[i].first);
        ymin[i]=min(ymin[i-1],v[i].second);
        ymax[i]=max(ymax[i-1],v[i].second);
    }
    for(i=0;i<h*w;i++){
        if (i+1==(xmax[i]-xmin[i]+1)*(ymax[i]-ymin[i]+1))
            ans++;
    }
}
int swap_seats(int a,int b)
{
    if (a>b)
        swap(a,b);
    swap(v[a],v[b]);
    if (a==0){
        xmin[0]=xmax[0]=v[0].first;
        ymin[0]=ymax[0]=v[0].second;
    }
    for(i=max(a,1);i<=b;i++){
        if (i+1==(xmax[i]-xmin[i]+1)*(ymax[i]-ymin[i]+1))
            ans--;
        xmin[i]=min(xmin[i-1],v[i].first);
        xmax[i]=max(xmax[i-1],v[i].first);
        ymin[i]=min(ymin[i-1],v[i].second);
        ymax[i]=max(ymax[i-1],v[i].second);
        if (i+1==(xmax[i]-xmin[i]+1)*(ymax[i]-ymin[i]+1))
            ans++;
    }
    return ans;
}

Compilation message (stderr)

seats.cpp: In function 'int swap_seats(int, int)':
seats.cpp:37:9: error: 'i' was not declared in this scope
   37 |     for(i=max(a,1);i<=b;i++){
      |         ^