#include using namespace std; typedef signed long long ll; #undef _P #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 ITR(x,c) for(__typeof(c.begin()) x=c.begin();x!=c.end();x++) #define ALL(a) (a.begin()),(a.end()) #define ZERO(a) memset(a,0,sizeof(a)) #define MINUS(a) memset(a,0xff,sizeof(a)) //------------------------------------------------------- int N,K,X; int S[101010]; int A[101010],B[101010]; int C[101010]; void solve() { int i,j,k,l,r,x,y; string s; cin>>N>>K>>X; FOR(i,N) S[i+1]=i+1; for(i=1;i<=K;i++) { cin>>A[i]>>B[i]; if(i>C[i+1]; for(i=K;i>X;i--) swap(C[A[i]],C[B[i]]); vector V; FOR(i,N) if(S[i+1]!=C[i+1]) V.push_back(i+1); _P("%d %d\n",V[0],V[1]); } int main(int argc,char** argv){ string s;int i; if(argc==1) ios::sync_with_stdio(false), cin.tie(0); FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin); solve(); return 0; }