Compilare: main.cpp: In function 'int main()': main.cpp:8:21: warning: unused variable 'x' [-Wunused-variable] int n, k, i, j, x; ^ main.cpp:14:27: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d%d", &k, &n); ^ main.cpp:16:28: warning: ignoring return value of 'int fscanf(FILE*, const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] fscanf(fin,"%d", &v[i]); ^