#include using namespace std; typedef signed long long ll; #define _P(...) (void)printf(__VA_ARGS__) #define FOR(x,to) for(x=0;x<(to);x++) #define FORR(x,arr) for(auto& x:arr) #define FORR2(x,y,arr) for(auto& [x,y]:arr) #define ALL(a) (a.begin()),(a.end()) #define ZERO(a) memset(a,0,sizeof(a)) #define MINUS(a) memset(a,0xff,sizeof(a)) template bool chmax(T &a, const T &b) { if(a bool chmin(T &a, const T &b) { if(a>b){a=b;return 1;}return 0;} //------------------------------------------------------- int N,K; int P[1010][1010]; vector E[1010][1010]; pair pat[2][1010]; int ret[1010]; int used[1010]; void solve() { int i,j,k,l,r,x,y; string s; cin>>N>>K; FOR(i,N-1) { FOR(j,N) { cin>>P[i][j+1]; if(P[i][j+1]) E[i][P[i][j+1]].push_back(j+1); } } set S; if(K==0||K==N-1) { if(K==0) S.insert(N); else S.insert(1); } else { set S1={1},S2={N}; x=0; MINUS(pat); FOR(i,N-1) if(x==0) { if(i