#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
using namespace std;
typedef long long ll;
typedef double db;
typedef vector<long long> vl;
typedef pair<long long , long long > pl;
const int N=1e6+1;
#define po pop_back
#define pb push_back
#define mk make_pair
#define lw lower_bound
#define up upper_bound
#define ff first
#define ss second
#define boost ios_base::sync_with_stdio(); cin.tie(0); cout.tie(0);
#define MOD 1000000007
#define MAX 1e18
#define MIN -1e18
#define rep(i,a,b) for(ll i=a;i<=b;i++)
#define per(i,a,b) for(ll i=b;i>=a;i--)
#define con continue
#define freopen freopen("input.txt", "r", stdin);freopen("output.txt", "w", stdout);
#define PI 3.14159265358979323846264338327950288419716939937510582097494459230781640628
// typedef tree<ll , null_type, less<ll>, rb_tree_tag, tree_order_statistics_node_update> indexed_set;
// template< typename T>
// using indexed_set = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
ll sz,n,m,ans,mid,mn,mx,cnt,T,sum,h1,h2,e[1234567],b[1234567],c[1234567],d[1<<20],k,i,j,l,r,h,a[1234567],w,x,y,z;
bool used[1234567];
vector<ll> v[1234567];
ll dx[4]={-1,1,0,0},dy[4]={0,0,-1,1},c1[123][123];
void init(int R, int C, int sr, int sc, int M, char *S) {
string s;
n=R;m=C;
s=S;
x = sr;
y = sc;
c1[x][y]=1;
for(auto u:s){
if(u=='N'){
x--;
}
if(u=='S'){
x++;
}
if(u=='W'){
y--;
}
if(u=='E'){
y++;
}
c1[x][y]=MAX;
}
}
int colours(int ar,int ac,int br,int bc){
ll a,b,aa,bb,x,y,xx,yy;
a = ar;
b = ac;
aa = br;
bb = bc;
x = max(a,aa);
xx = min(a,bb);
y = max(b,bb);
yy = min(b,bb);
rep(i,xx,x){
rep(j,yy,y){
if(c1[i][j]!=MAX)c1[i][j]=0;
}
}
ans=0;
rep(i,xx,x){
rep(j,yy,y){
if(c1[i][j]==0){
ans++;
queue<pl> q;
q.push({i,j});
while(q.size()){
pl p=q.front();
ll a,b;
a=p.ff;
b=p.ss;
c1[a][b]=1;
q.pop();
rep(k,0,3){
if(a+dx[k] <= x && a+dx[k] >= xx &&b+dy[k] <= y && b+dy[k] >= yy && c1[a+dx[k]][b+dy[k]]==0)q.push({a+dx[k] , b+dy[k]});
}
}
}
}
}
return ans;
}
Compilation message
/tmp/ccvwwxhQ.o: In function `main':
grader.cpp:(.text.startup+0x131): undefined reference to `colour(int, int, int, int)'
collect2: error: ld returned 1 exit status
