#include<bits/stdc++.h>
#include "rainbow.h"
using namespace std;
#define ll long long
#define pb push_back
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
#define rall(s) s.rbegin(),s.rend()
bool used[51][51],water[51][51];
vector<int>dx={1,-1,0,0};
vector<int>dy={0,0,1,-1};
int r1,r2,c1,c2;
bool check(int x,int y){
if(x<r1||x>r2||y<c1||y>c2) return false;
return true;
}
void dfs(int x,int y){
if(!check(x,y)||water[x][y]==true||used[x][y]==true) return;
used[x][y]=true;
for(int i=0;i<4;i++){
dfs(x+dx[i],y+dy[i]);
}
}
void init(int R,int C,int sr,int sc,int M,char *S){
water[sr][sc]=true;
for(int i=0;i<M;i++){
if(S[i]=='N') sr--;
if(S[i]=='S') sr++;
if(S[i]=='W') sc--;
if(S[i]=='E') sc++;
water[sr][sc]=true;
}
}
int colours(int ar,int ac,int br,int bc){
r1=ar;
r2=br;
c1=ac;
c2=bc;
memset(used,0,sizeof used);
int ans=0;
for(int i=ar;i<=br;i++){
for(int j=ac;j<=bc;j++){
if(!used[i][j]&&water[i][j]==false){
ans++;
dfs(i,j);
}
}
}
return ans;
}
Compilation message
/usr/bin/ld: /tmp/ccD2iZar.o: in function `main':
grader.cpp:(.text.startup+0x167): undefined reference to `colour(int, int, int, int)'
collect2: error: ld returned 1 exit status
