Language: C++

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
int n, m, q;
string s, t;
const int mod = (int)1e9 + 7;
const int maxN = (int)1e5 + 100;
int tp[2][maxN];
int nxt[2][2][2][maxN];
int num[2];
const int INF = (int)1e9;
const int BUBEN = 6;
int get_dir(int a) {
    if (a > 0) return 1;
    else if (a == 0) return 0;
    else return -1;
}
// nxt[a][b][c][d]
// a - row / cols
// b - find up or down
// c - upper or downer
// d - who
//map < pair < int, int >, int > mp;
bool can_simple(int fromx, int fromy, int tox, int toy) {
    bool ok1 = true;
    bool ok2 = true;
    if (fromx != tox) {
        if (get_dir(tox - fromx) != tp[1][fromy]) {
            ok1 = false;
        }
        if (get_dir(tox - fromx) != tp[1][toy]) ok2 = false;
    }
    if (fromy != toy) {
        if (get_dir(toy - fromy) != tp[0][tox]) ok1 = false;
        if (get_dir(toy - fromy) != tp[0][fromx]) ok2 = false;
    }
    if (ok1 || ok2) return true;
    return false;
}
int solve(int fromx, int fromy, int tox, int toy, int step) {
    // cout << fromx << " " << fromy << " " << tox << " " << toy << " " << step << endl;
    /*if (fromx == 3 && fromy == 1 && step == 5) {
        exit(0);
    }*/
    if (step == BUBEN) return INF;
   // mp[make_pair(fromx, fromy)] = step;
    int ans = INF;
    bool ok1 = true;
    bool ok2 = true;
    if (fromx != tox) {
        if (get_dir(tox - fromx) != tp[1][fromy]) {
            ok1 = false;
        }
        if (get_dir(tox - fromx) != tp[1][toy]) ok2 = false;
    }
    if (fromy != toy) {
        if (get_dir(toy - fromy) != tp[0][tox]) ok1 = false;
        if (get_dir(toy - fromy) != tp[0][fromx]) ok2 = false;
    }
    if (ok1 || ok2) return abs(fromx - tox) + abs(fromy - toy);
    for (int i = 0; i < 2; i++) {
        for (int k = -1; k <= 1; k += 2) {
            int val = (k + 1) / 2;
            if (nxt[0][val][i][fromx] == -1) continue;
            int where = nxt[0][val][i][fromx];
            if (where == fromx) continue;
            if (where != fromx) {
                if (get_dir(where - fromx) != tp[1][fromy]) continue;
            }
            ans = min(ans, abs(where - fromx) + solve(where, fromy, tox, toy, step + 1));
        }
    }
    for (int i = 0; i < 2; i++) {
        for (int k = -1; k <= 1; k += 2) {
            int val = (k + 1) / 2;
            if (nxt[1][val][i][fromy] == -1) continue;
            int where = nxt[1][val][i][fromy];
            if (where == fromy) continue;
            if (where != fromy) {
                if (get_dir(where - fromy) != tp[0][fromx]) continue;
            }
            ans = min(ans, abs(where - fromy) + solve(fromx, where, tox, toy, step + 1));
        }
    }
    return ans;
}
signed main() {
    //freopen("input.txt", "r", stdin);
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
    cin >> n >> m >> q;
    num[0] = n;
    num[1] = m;
    cin >> s >> t;
    for (int i = 0; i < s.size(); i++) {
        if (s[i] == 'E') tp[0][i + 1] = 1;
        else tp[0][i + 1] = -1;
    }
    for (int j = 0; j < t.size(); j++) {
        if (t[j] == 'N') tp[1][j + 1] = -1;
        else tp[1][j + 1] = 1;
    }
    for (int i = 0; i < 2; i++) {
        for (int k = -1; k <= 1; k += 2) {
            int val = (k + 1) / 2;
            nxt[i][val][0][0] = -1;
            for (int j = 1; j <= num[i]; j++) {
                nxt[i][val][0][j] = nxt[i][val][0][j - 1];
                if (tp[i][j] == k) nxt[i][val][0][j] = j;
            }
            nxt[i][val][1][num[i] + 1] = -1;
            for (int j = num[i]; j >= 1; j--) {
                nxt[i][val][1][j] = nxt[i][val][1][j + 1];
                if (tp[i][j] == k) nxt[i][val][1][j] = j;
            }
        }
    }
    for (int i = 0; i < q; i++) {
        int a, b, c, d;
        cin >> a >> b >> c >> d;
        mp.clear();
        int x = solve(a, b, c, d, 0);
        if (x >= INF) cout << -1 << '\n';
        else cout << x << '\n';
    }
    return 0;
}


Compiler output:
a.cc: In function 'int main()':
a.cc:124:9: error: 'mp' was not declared in this scope; did you mean 'tp'?
  124 |         mp.clear();
      |         ^~
      |         tp