#define _USE_MATH_DEFINES #include //cin, cout #include //vector #include //sort,min,max,count #include //string,getline, to_string #include //abs(int) #include //swap, pair #include //deque #include //INT_MAX #include //bitset #include //sqrt, ceil. M_PI, pow, sin #include //fixed #include //setprecision #include //stringstream #include //gcd, assumlate #include //randam_device #include //numeric_limits using namespace std; constexpr long long int D_MOD = 1000000007; int main() { int N; cin >> N; if (N % 2 == 0) { for (int i = 0; i < N / 2; i++) { cout << 1; } cout << endl; } else { cout << 7; for (int i = 1; i < N / 2; i++) { cout << 1; } cout << endl; } return 0; }