Compilare: main.c: In function 'main': main.c:22:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i=2;i<N;++i) ^~~ main.c:25:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(scanf("%d",&t);t;--t) { ^~~ main.c:17:2: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("ssnd.in","r",stdin),freopen("ssnd.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:17:31: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("ssnd.in","r",stdin),freopen("ssnd.out","w",stdout); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:25:6: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] for(scanf("%d",&t);t;--t) { ^~~~~~~~~~~~~~ main.c:26:13: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] for(scanf("%lld",&n),w=z=i=1;i<=k&&1LL*p[i]*p[i]<=n;i++) { ^~~~~~~~~~~~~~~~