Compilare: main.c: In function 'main': main.c:5:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("raze.in","r",stdin),freopen("raze.out","w",stdout),scanf("%d",&t); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:34: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("raze.in","r",stdin),freopen("raze.out","w",stdout),scanf("%d",&t); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:65: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("raze.in","r",stdin),freopen("raze.out","w",stdout),scanf("%d",&t); ^~~~~~~~~~~~~~ main.c:7:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^~~~~~~~~~~~~~~~~~~ main.c:10:17: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&a[i][j]),c[i][j]=b[i][j]=e[i][j]=d[i][j]=0; ^~~~~~~~~~~~~~~~~~~~