#include<iostream>
#include<algorithm>
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
#define ff first
#define ss second
const int N = 2e5 + 8;
const int dr[4] = { 0, 0, 1, -1 };
const int dc[4] = { 1, -1, 0, 0 };
int r, c, m, q, sr, sc;
int num[256];
string s;
namespace subtask1 {
bool vis_init[52][52], vis[52][52];
void init() {
vis_init[sr][sc] = true;
for (char c : s) {
sr += dr[num[c]];
sc += dc[num[c]];
vis_init[sr][sc] = true;
}
}
void dfs(int i, int j) {
vis[i][j] = true;
for (int k = 0, i2, j2; k < 4; ++k) {
i2 = i + dr[k], j2 = j + dc[k];
if (!vis[i2][j2]) dfs(i2, j2);
}
}
int solve(int ar, int ac, int br, int bc) {
int m = br - ar + 1, n = bc - ac + 1;
for (int i = 1; i <= m; ++i) vis[i][0] = vis[i][n + 1] = true;
for (int j = 1; j <= n; ++j) vis[0][j] = vis[m + 1][j] = true;
for (int i = 1; i <= m; ++i)
for (int j = 1; j <= n; ++j)
vis[i][j] = vis_init[i + ar - 1][j + ac - 1];
int cnt(0);
for (int i = 1; i <= m; ++i)
for (int j = 1; j <= n; ++j)
if (!vis[i][j]) dfs(i, j), ++cnt;
return cnt;
}
}
void init(int R, int C, int SR, int SC, int M, char *S) {
num['E'] = 0, num['W'] = 1, num['S'] = 2, num['N'] = 3;
r = R, c = C, sr = SR, sc = SC, m = M;
for (int i = 0; i < m; ++i) s.push_back(S[i]);
if (r <= 50 && c <= 50)
subtask1::init();
}
int colours(int ar, int ac, int br, int bc) {
// if (r <= 50 && c <= 50)
return subtask1::solve(ar, ac, br, bc);
}
/** /\_/\
* (= ._.)
* / >0 \>1
**/
Compilation message
rainbow.cpp: In function 'void subtask1::init()':
rainbow.cpp:22:26: warning: array subscript has type 'char' [-Wchar-subscripts]
22 | sr += dr[num[c]];
| ^
rainbow.cpp:23:26: warning: array subscript has type 'char' [-Wchar-subscripts]
23 | sc += dc[num[c]];
| ^
/usr/bin/ld: /tmp/ccZSKPs0.o: in function `main':
grader.cpp:(.text.startup+0x167): undefined reference to `colour(int, int, int, int)'
collect2: error: ld returned 1 exit status
