Borderou de evaluare (job #598098)

Eroare de compilare: main.cpp: In function 'int main()': main.cpp:7:38: error: expression cannot be used as a function 7 | cout << (n / k)(((k - 1) * k) / 2) + (n % k)(n % k + 1) / 2; | ^ main.cpp:7:59: error: expression cannot be used as a function 7 | cout << (n / k)(((k - 1) * k) / 2) + (n % k)(n % k + 1) / 2; | ^ main.cpp:5:27: warning: unused variable 'x' [-Wunused-variable] 5 | unsigned long long n, x, y, s = 0, k; | ^ main.cpp:5:30: warning: unused variable 'y' [-Wunused-variable] 5 | unsigned long long n, x, y, s = 0, k; | ^ main.cpp:5:33: warning: unused variable 's' [-Wunused-variable] 5 | unsigned long long n, x, y, s = 0, k; | ^