Compilare: user.cpp: In function ‘int main()’: user.cpp:32:13: warning: unused variable ‘K’ [-Wunused-variable] int K = 0, cnt = 0, cnt_aux = 0, temp_answer = 0; ^ user.cpp:32:42: warning: unused variable ‘temp_answer’ [-Wunused-variable] int K = 0, cnt = 0, cnt_aux = 0, temp_answer = 0; ^ user.cpp:21:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( input_file, "%d %d", &N, &M ); ^ user.cpp:24:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( input_file, "%d", &L[i] ); ^ user.cpp:28:45: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf( input_file, "%d", &A[j][i] ); ^