#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; int A[101010]; void solve() { int i,j,k,l,r,x,y; cin>>N; FOR(i,N) cin>>A[i]; if(count(A,A+N,A[0])==N) return _P("0\n"); int ret=0; int s=0; while(A[s]==A[N-1]) s++, ret=1; map P; for(i=s;i