#include using namespace std; using i64 = int64_t; using ui64 = uint64_t; #ifdef LOCAL_DEBUG #define debug(X) std::cerr << X << " " #define debugV(X) std::cerr << #X << " = " << X << ", " #define debugVL(Y) std::cerr << #Y << " = " << Y << '\n' #define debugWL(Z) std::cerr << #Z << '\n' #define debugP() std::cerr << "Line:" << __LINE__ << '\n' #else #define debug(X) #define debugV(X) #define debugVL(Y) #define debugWL(Z) #define debugP() #endif i64 myRnd64(i64 L, i64 R){ random_device seedGen; mt19937_64 rd(seedGen()); i64 ret = L + (rd() % (R - L + 1)); return ret; } int main() { int T; cin >> T; while(T--){ int N; cin >> N; vector f(N, 0); for(int i = 0; i < N; i++){ cin >> f.at(i); } int ret = 0; for(int i = 0; i < N; i++){ ret += f.at(i); } ret = N - ret; cout << myRnd64(0, N) << '\n'; } }