#include "rainbow.h"
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define all(x) x.begin(), x.end()
#define size(x) (int)x.size()
template<class S, class T>
bool chmin(S& a, const T& b) {
return a > b ? (a = b) == b : false;
}
template<class S, class T>
bool chmax(S& a, const T& b) {
return a < b ? (a = b) == b : false;
}
const vector<int> dx = {0, 0, -1, 1};
const vector<int> dy = {-1, 1, 0, 0};
int n, m, x, y, k;
string s;
vector<vector<char>> g;
vector<vector<bool>> vis;
vector<int> pref[2], cmp;
void init(int R, int C, int sr, int sc, int M, string S) {
n = R, m = C, x = sr - 1, y = sc - 1, k = M, s = S;
g.resize(n);
vis.resize(n);
for (int i = 0; i < n; ++i) {
g[i].assign(m, '.');
vis[i].assign(m, false);
}
g[x][y] = '#';
for (int i = 0; i < k; ++i) {
if (s[i] == 'N') x--;
else if (s[i] == 'S') x++;
else if (s[i] == 'E') y--;
else y++;
g[x][y] = '#';
}
if (n == 2) {
pref[0].resize(m);
pref[1].resize(m);
cmp.resize(m);
for (int i = 0; i < 2; ++i) {
pref[i][0] = g[i][0] == '.';
for (int j = 1; j < m; ++j) {
int add = 0;
if (g[i][j] == '.' && g[i][j - 1] == '#') {
add = 1;
}
pref[i][j] = pref[i][j - 1] + add;
}
}
if (g[0][0] == '.' || g[1][0] == '.') cmp[0] = 1;
else cmp[0] = 0;
for (int j = 1; j < m; ++j) {
int add = 1;
if (g[0][j] == '.' && g[0][j - 1] == '.') add = 0;
if (g[1][j] == '.' && g[1][j - 1] == '.') add = 0;
cmp[j] = cmp[j - 1] + add;
}
}
}
bool check(int i, int j) {
return i >= 0 && i < n && j >= 0 && j < m;
}
void dfs(int i, int j) {
vis[i][j] = true;
for (int idx = 0; idx < 4; ++idx) {
int I = i + dx[idx], J = j + dy[idx];
if (check(I, J) && !vis[I][J] && g[I][J] != '#') {
dfs(I, J);
}
}
}
int colour(int ar, int ac, int br, int bc) {
ar--, ac--, br--, bc--;
if (n == 2) {
int cnt = 0;
if (ar == br) {
cnt = pref[ar][bc];
if (ac) cnt -= pref[ar][ac - 1];
} else {
cnt = cmp[bc];
if (ac) {
cnt -= cmp[ac - 1];
int add = 0;
if (g[0][ac] == '.' && g[0][ac - 1] == '.') add = 1;
if (g[1][ac] == '.' && g[1][ac] - 1 == '.') add = 1;
cnt += add;
}
}
return cnt;
} else {
int cnt = 0;
for (int i = ar; i <= br; ++i) {
for (int j = ac; j <= bc; ++j) {
if (!vis[i][j] && g[i][j] == '.') {
cnt++;
dfs(i, j);
}
}
}
for (int i = ar; i <= br; ++i) {
for (int j = ac; j <= bc; ++j) {
vis[i][j] = false;
}
}
return cnt;
}
}
Compilation message
/usr/bin/ld: /tmp/ccaLBTVV.o: in function `main':
grader.cpp:(.text.startup+0xed): undefined reference to `init(int, int, int, int, int, char*)'
/usr/bin/ld: grader.cpp:(.text.startup+0x167): undefined reference to `colour(int, int, int, int)'
collect2: error: ld returned 1 exit status
