// Same as simulator.cpp but with more diagnostics #include #include #include #include using namespace std; int main(int argc, char* argv[]) { int n = 100000, subtask = 3; if (argc > 1) n = atoi(argv[1]); if (argc > 2) subtask = atoi(argv[2]); vector ring(n); iota(ring.begin(), ring.end(), 1); mt19937 rng(42); shuffle(ring.begin(), ring.end(), rng); vector pos(n+1); for (int i = 0; i < n; i++) pos[ring[i]] = i; vector vis(n+2, 0); int an = 0; auto flip2 = [&](int u) -> int { int pu = pos[u] + 1; if ((vis[pu] ^= 1)) { an += vis[pu-1] + vis[pu+1]; } else { an -= vis[pu-1] + vis[pu+1]; } return an || (vis[1] && vis[n]); }; int pipe_to_sol[2], pipe_from_sol[2]; pipe(pipe_to_sol); pipe(pipe_from_sol); pid_t pid = fork(); if (pid == 0) { close(pipe_to_sol[1]); close(pipe_from_sol[0]); dup2(pipe_to_sol[0], STDIN_FILENO); dup2(pipe_from_sol[1], STDOUT_FILENO); close(pipe_to_sol[0]); close(pipe_from_sol[1]); execl("./solution_v2", "solution_v2", nullptr); perror("execl"); _exit(1); } close(pipe_to_sol[0]); close(pipe_from_sol[1]); FILE* to_sol = fdopen(pipe_to_sol[1], "w"); FILE* from_sol = fdopen(pipe_from_sol[0], "r"); auto readIntFrom = [&]() -> int { int c = fgetc(from_sol); while (c != '-' && (c < '0' || c > '9')) { if (c == EOF) return -999; c = fgetc(from_sol); } int sgn = 1; if (c == '-') { sgn = -1; c = fgetc(from_sol); } int x = 0; while (c >= '0' && c <= '9') { x = x*10+(c-'0'); c = fgetc(from_sol); } return x * sgn; }; int cnt_round = 0, cnt_query = 0; auto start_time = chrono::steady_clock::now(); fprintf(to_sol, "%d %d\n", subtask, n); fflush(to_sol); bool correct = false; bool error = false; int max_round_size = 0; while (true) { int N = readIntFrom(); if (N == -999) { fprintf(stderr, "EOF from solution\n"); error = true; break; } if (N == -1) { vector ans(n); for (int i = 0; i < n; i++) { ans[i] = readIntFrom(); if (ans[i] == -999) { error = true; break; } } if (error) break; int opt = -1; for (int i = 0; i < n; i++) if (ans[0] == ring[i]) { opt = i; break; } if (opt == -1) { fprintf(stderr, "Answer vertex not in ring\n"); break; } bool f1 = true, f2 = true; int mismatch_idx = -1; for (int i = 1; i < n; i++) { int op1 = (opt + i) % n; int op2 = (opt - i + n) % n; if (ring[op1] != ans[i]) f1 = false; if (ring[op2] != ans[i]) f2 = false; if (!f1 && !f2) { mismatch_idx = i; break; } } correct = f1 || f2; if (!correct) { fprintf(stderr, "Mismatch at index %d\n", mismatch_idx); fprintf(stderr, "ans[%d]=%d, expected fwd=%d or bwd=%d\n", mismatch_idx, ans[mismatch_idx], ring[(opt + mismatch_idx) % n], ring[(opt - mismatch_idx + n) % n]); // Count how many answer vertices are valid ring vertices set ansSet(ans.begin(), ans.end()); fprintf(stderr, "Unique answer vertices: %d / %d\n", (int)ansSet.size(), n); // Check if answer is a valid permutation bool validPerm = (int)ansSet.size() == n; for (int v : ans) if (v < 1 || v > n) { validPerm = false; break; } fprintf(stderr, "Valid permutation: %s\n", validPerm ? "yes" : "no"); // Check how many edges in answer match ring edges set> ringEdges; for (int i = 0; i < n; i++) { int a = ring[i], b = ring[(i+1)%n]; ringEdges.insert({min(a,b), max(a,b)}); } int matchEdges = 0; for (int i = 0; i < n; i++) { int a = ans[i], b = ans[(i+1)%n]; if (ringEdges.count({min(a,b), max(a,b)})) matchEdges++; } fprintf(stderr, "Matching edges in answer: %d / %d\n", matchEdges, n); } break; } if (N > 10000000) { fprintf(stderr, "Round %d: SINGLE_QUERY_LIM exceeded: %d > 10M\n", cnt_round+1, N); // Still process it for testing } cnt_round++; cnt_query += N; if (N > max_round_size) max_round_size = N; vector ops(N); for (int i = 0; i < N; i++) { ops[i] = readIntFrom(); if (ops[i] == -999) { error = true; break; } } if (error) break; for (int i = 0; i < N; i++) { int res = flip2(ops[i]); if (i > 0) fputc(' ', to_sol); fprintf(to_sol, "%d", res); } fputc('\n', to_sol); fflush(to_sol); } auto end_time = chrono::steady_clock::now(); double elapsed = chrono::duration(end_time - start_time).count(); fclose(to_sol); fclose(from_sol); int status; waitpid(pid, &status, 0); auto f = [](double x) -> double { return min(max(log2(x), 0.0), 8.0); }; double lambda_val = max(0.0, 1.0 - 0.1 * (f(cnt_round / 18.0) + f(cnt_query / 1.5e7))); printf("=== Results ===\n"); printf("Correct: %s\n", correct ? "YES" : "NO"); printf("Rounds: %d\n", cnt_round); printf("Queries: %d\n", cnt_query); printf("Max round size: %d\n", max_round_size); printf("Time: %.3f s\n", elapsed); printf("Lambda: %.4f\n", lambda_val); printf("f(rounds): %.4f\n", f(cnt_round / 18.0)); printf("f(queries): %.4f\n", f(cnt_query / 1.5e7)); return correct ? 0 : 1; }