#include "rainbow.h"
#include<bits/stdc++.h>
#define pb push_back
#define fi first
#define se second
#define mp make_pair
using namespace std;
typedef long long ll;
typedef unsigned long long ull;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef long double ld;
template <typename T> bool chkmin(T &x,T y){return x>y?x=y,1:0;}
template <typename T> bool chkmax(T &x,T y){return x<y?x=y,1:0;}
int readint(){
int x=0,f=1; char ch=getchar();
while(ch<'0'||ch>'9'){if(ch=='-')f=-1;ch=getchar();}
while(ch>='0'&&ch<='9'){x=x*10+ch-'0';ch=getchar();}
return x*f;
}
int mat[55][55];
void init(int r,int c,int sc,int sr,int m,char* s){
mat[sc][sr]=1;
for(int i=0;i<m;i++){
if(s[i]=='N') sc--;
if(s[i]=='S') sc++;
if(s[i]=='E') sr++;
if(s[i]=='W') sr--;
mat[sc][sr]=1;
}
}
int color(int x1,int y1,int x2,int y2){
int res=0;
for(int i=x1;i<=x2;i++) for(int j=y1;j<=y2;j++) res+=1-mat[i][j];
for(int i=x1;i<=x2;i++) for(int j=y1;j<=y2;j++){
if(mat[i][j]==1) continue;
if(i+1<=x2&&mat[i+1][j]==0) res--;
if(j+1<=y2&&mat[i][j+1]==0) res--;
if(i+1<=x2&&j+1<=y2&&mat[i+1][j]==0&&mat[i][j+1]==0&&mat[i+1][j+1]==0) res++;
}
return res;
}
Compilation message
/usr/bin/ld: /tmp/ccp53a5p.o: in function `main':
grader.cpp:(.text.startup+0x167): undefined reference to `colour(int, int, int, int)'
collect2: error: ld returned 1 exit status
