Compilare: user.c: In function ‘main’: user.c:3:12: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] int main(){freopen("stirling.in","r",stdin),freopen("stirling.out","w",stdout),scanf("%d",&t); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:3:45: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] int main(){freopen("stirling.in","r",stdin),freopen("stirling.out","w",stdout),scanf("%d",&t); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ user.c:3:80: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] int main(){freopen("stirling.in","r",stdin),freopen("stirling.out","w",stdout),scanf("%d",&t); ^~~~~~~~~~~~~~ user.c:8:13: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] while(t--){scanf("%d%d%d",&i,&n,&m),printf("%d\n",i==1?s[n][m]:r[n][m]);} ^~~~~~~~~~~~~~~~~~~~~~~~