N3_ФТ_перебор

#include <iostream>
#include <cmath>
#include <vector>
#include <queue>
#include <algorithm>
#include <string>
#include <stack>
#include <set>
#include <map>
#define pii pair <int, int>
#define pb(x) push_back(x)
using namespace std;
using ll = long long;
using ld = long double;
using db = double;
void cv(vector <int> &v) {
    for (auto x : v) cout << x << ' ';
    cout << "\n";
}

void cvl(vector <ll> &v) {
    for (auto x : v) cout << x << ' ';
    cout << "\n";
}


void cvv(vector <vector <int> > &v) {
    for (auto x : v) cv(x);
    cout << "\n";
}

void cvb(vector <bool> v) {
    for (bool x : v) cout << x << ' ';
    cout << "\n";
}

void cvs(vector <string>  v) {
    for (auto a : v) {
        cout << a << "\n";
    }
}

void cvp(vector <pii> a) {
    for (auto p : a) {
        cout << p.first << ' ' << p.second << "\n";
    }
    cout << "\n";
}



int main() {
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n = 25, m = 37;
    int v1=0;
    for (int a = 0; a < n - 1; ++a) {
        for (int b = 0; b < m; ++b) {
            for (int c = 0; c < n; ++c) {
                for (int d = 0; d < m - 1; ++d) {
                    vector <pii> ab = { {a, b}, {a + 1, b} }, cd = { {c, d}, {c, d + 1} };
                    bool ok = 1;
                    for (auto pab: ab) {
                        for (auto pcd: cd) {
                            if (pab == pcd) {
                                ok = 0;
                            }
                        }
                    }
                    if (!ok) {
                        continue;
                    }
                    v1++;
                }
            }
        }
    }
    cout << "v1 = " << v1 << "\n";
    int v3 = 0;
    for (int a = 0; a < n; ++a) {
        for (int b = 0; b < m - 1; ++b) {
            for (int c = 0; c < n; ++c) {
                for (int d = 0; d < m - 1; ++d) {
                    vector <pii> ab = { {a, b}, {a, b + 1} }, cd = { {c, d}, {c, d + 1} };
                    bool ok = 1;
                    for (auto pab: ab) {
                        for (auto pcd: cd) {
                            if (pab == pcd) {
                                ok = 0;
                            }
                        }
                    }
                    if (!ok) {
                        continue;
                    }
                    v3++;
                }
            }
        }
    }
    cout << "v3 = " << v3 << "\n";
    int v4 = 0;
    for (int a = 0; a < n - 1; ++a) {
        for (int b = 0; b < m; ++b) {
            for (int c = 0; c < n - 1; ++c) {
                for (int d = 0; d < m; ++d) {
                    vector <pii> ab = { {a, b}, {a + 1, b} }, cd = { {c, d}, {c + 1, d} };
                    bool ok = 1;
                    for (auto pab: ab) {
                        for (auto pcd: cd) {
                            if (pab == pcd) {
                                ok = 0;
                            }
                        }
                    }
                    if (!ok) {
                        continue;
                    }
                    v4++;
                }
            }
        }
    }
    cout << "v4 = " << v4 << "\n";
    int ans = 2*v1 + v3 + v4;
    ans /= 2;
    cout << "ans = " << ans << "\n";
}