Compilare: user.cpp: In function ‘int main()’: user.cpp:46:10: warning: unused variable ‘i’ [-Wunused-variable] int t, i, n, k, a; ^ user.cpp:46:13: warning: unused variable ‘n’ [-Wunused-variable] int t, i, n, k, a; ^ user.cpp:46:16: warning: unused variable ‘k’ [-Wunused-variable] int t, i, n, k, a; ^ user.cpp:46:19: warning: unused variable ‘a’ [-Wunused-variable] int t, i, n, k, a; ^ user.cpp:49:24: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &t); ^ user.cpp: In function ‘void solve()’: user.cpp:10:36: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d%d%d", &n, &k, &x); ^ user.cpp:16:26: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &x); ^