#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>r; A[y*4+x]=r; if(r) { int ty=(r-1)/4,tx=tx=(r-1)%4; if(abs(x-tx)+abs(y-ty)>1) return _P("No\n"); } } r=0; FOR(y,16) FOR(x,y) if(A[x]>A[y] && A[y]!=0) r++; if(r%2) return _P("No\n"); _P("Yes\n"); } int main(int argc,char** argv){ string s;int i; if(argc==1) ios::sync_with_stdio(false); FOR(i,argc-1) s+=argv[i+1],s+='\n'; FOR(i,s.size()) ungetc(s[s.size()-1-i],stdin); solve(); return 0; }