Compilare: main.c: In function 'main': main.c:15:11: warning: suggest explicit braces to avoid ambiguous 'else' [-Wparentheses] if(y[i]) ^ main.c:5:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("exp.in","r",stdin),freopen("exp.out","w",stdout),scanf("%d%d",&m,&n); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:33: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("exp.in","r",stdin),freopen("exp.out","w",stdout),scanf("%d%d",&m,&n); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:5:63: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("exp.in","r",stdin),freopen("exp.out","w",stdout),scanf("%d%d",&m,&n); ^~~~~~~~~~~~~~~~~~~ main.c:7:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^~~~~~~~~~~~~~