Compilare: user.c: In function ‘inmultire’: user.c:9:9: warning: unused variable ‘sum’ [-Wunused-variable] int sum,i,j,k; ^ user.c: In function ‘solve’: user.c:24:8: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if (k !=1) ^ user.c: In function ‘main’: user.c:58:11: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d %d %d",&n,&m,&k,&q); ^ user.c:70:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&x,&y); ^ user.c:83:15: warning: ignoring return value of ‘fscanf’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d %d",&x,&y); ^