#include using namespace std; const int B = 100; int main(){ int N; cin >> N; vector m(N); for (int i = 0; i < N; i++){ cin >> m[i]; m[i]--; } vector> p(B, vector(N)); for (int i = 0; i < N; i++){ p[0][m[i]] = i; } bool ok = false; for (int i = 0; i < B - 1; i++){ vector mx(N, -1); for (int j = 0; j < N; j++){ mx[p[i][j]] = max(mx[p[i][j]], j); } for (int j = 0; j < N; j++){ if (p[i][j] == 0){ p[i + 1][j] = 1; } else if (p[i][j] == N - 1){ p[i + 1][j] = N - 2; } else if (mx[p[i][j] - 1] > mx[p[i][j] + 1]){ p[i + 1][j] = p[i][j] - 1; } else { p[i + 1][j] = p[i][j] + 1; } } if (i >= 2){ if (p[i] == p[i - 2]){ int t = i - 2; set st; for (int j = 0; j < N; j++){ st.insert(p[i][j] + p[i + 1][j]); } cout << t << ' ' << st.size() << endl; ok = true; } } } if (!ok){ vector M(N, -1); for (int i = 0; i < N; i++){ M[p[B - 1][i]] = max(M[p[B - 1][i]], i); } for (int i = 0; i <= N - 5; i++){ if (M[i] >= 0 && M[i + 1] >= 0 && M[i + 2] >= 0 && M[i + 3] >= 0 && M[i + 4] >= 0){ assert(!(M[i + 2] < M[i] && M[i] < M[i + 1] && M[i + 4] < M[i + 2] && M[i + 2] < M[i + 3])); } } } }