Compilare: user.cpp: In function ‘int main()’: user.cpp:17:13: warning: unused variable ‘i’ [-Wunused-variable] long long i, j, sum, nr, k, aux, p, rez, x, y; ^ user.cpp:17:16: warning: unused variable ‘j’ [-Wunused-variable] long long i, j, sum, nr, k, aux, p, rez, x, y; ^ user.cpp:17:19: warning: unused variable ‘sum’ [-Wunused-variable] long long i, j, sum, nr, k, aux, p, rez, x, y; ^ user.cpp:17:24: warning: unused variable ‘nr’ [-Wunused-variable] long long i, j, sum, nr, k, aux, p, rez, x, y; ^ user.cpp:17:31: warning: unused variable ‘aux’ [-Wunused-variable] long long i, j, sum, nr, k, aux, p, rez, x, y; ^ user.cpp:18:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &N); ^