#include<bits/stdc++.h>
using namespace std;
#define X first
#define Y second
#define pb emplace_back
#define sz(x) (int)x.size()
#define all(x) x.begin(),x.end()
const int N = 2e5 + 1;
typedef pair<int,int> ii;
typedef vector<int> vi;
vector<vi> dx = {{0},{0,1},{0},{0,1}};
vector<vi> dy = {{0},{0,1},{0,1},{0}};
struct BIT2D {
vector<ii> add;
vector<int> v[N];
void ini() {
sort(add.begin(),add.end());
add.erase(unique(add.begin(),add.end()),add.end());
for(ii a : add)
for(int x = a.X ; x < N ; x += x & -x)
v[x].push_back(a.Y);
for(int i = 1 ; i < N ; ++i)
sort(v[i].begin(),v[i].end());
}
int get(int x,int l,int r) {
int ans = 0;
for(; x > 0 ; x -= x & -x) {
auto L = lower_bound(v[x].begin(),v[x].end(),l);
auto R = upper_bound(v[x].begin(),v[x].end(),r);
ans += R - L;
}
return ans;
}
int get(int l,int r,int u,int d) {
if (l > r) return 0;
if (u > d) return 0;
return get(r,u,d) - get(l - 1,u,d);
}
} T[4];
int min_r = 1e9, min_c = 1e9;
int max_r = -1e9, max_c = -1e9;
void init(int R,int C,int sr,int sc,int m,string S) {
S = "$" + S;
ii Head(sr,sc);
for(char c : S) {
if (c == 'N') Head.X--;
if (c == 'S') Head.X++;
if (c == 'W') Head.Y--;
if (c == 'E') Head.Y++;
min_r = min(min_r,Head.X); max_r = max(max_r,Head.X);
min_c = min(min_c,Head.Y); max_c = max(max_c,Head.Y);
for(int i = 0 ; i < 4 ; ++i)
for(int x : dx[i])
for(int y : dy[i]) T[i].add.pb(Head.X + x,Head.Y + y);
}
for(int i = 0 ; i < 4 ; ++i) T[i].ini();
}
int colour(int l,int u,int r,int d) {
int V = T[1].get(l + 1,r,u + 1,d);
int F = T[0].get(l,r,u,d);
int E = T[2].get(l,r,u + 1,d) + T[3].get(l + 1,r,u,d);
return E - V - F + 1 + (l < min_r && max_r < r && u < min_c && max_c < d);
}
Compilation message
/tmp/ccSZ1z8Z.o: In function `main':
grader.cpp:(.text.startup+0xcc): undefined reference to `init(int, int, int, int, int, char*)'
collect2: error: ld returned 1 exit status
