Compilare: main.c: In function 'main': main.c:7:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(i=1;i<=n;++i) ^~~ main.c:9:2: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for(i=2;i<=n;++i) ^~~ main.c:6:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("rmq.in","r",stdin),freopen("rmq.out","w",stdout),scanf("%d%d",&n,&m); ^~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:6:33: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("rmq.in","r",stdin),freopen("rmq.out","w",stdout),scanf("%d%d",&n,&m); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:6:63: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("rmq.in","r",stdin),freopen("rmq.out","w",stdout),scanf("%d%d",&n,&m); ^~~~~~~~~~~~~~~~~~~ main.c:8:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&j),b[0][i]=j; ^~~~~~~~~~~~~~ main.c:15:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&i,&j),n=c[j-i+1],printf("%d\n",N(b[n][i],b[n][j+1-(1<<n)])); ^~~~~~~~~~~~~~~~~~~