Compilare: main.c: In function 'buildTree': main.c:82:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.c: In function 'updateTree': main.c:113:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.c: In function 'querryTree': main.c:138:1: warning: control reaches end of non-void function [-Wreturn-type] } ^ main.c: In function 'main': main.c:147:2: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(read, "%d%d", &N ,&M); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:152:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(read, "%d", &array[i]); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:162:3: warning: ignoring return value of 'fscanf', declared with attribute warn_unused_result [-Wunused-result] fscanf(read, "%d%d%d", &type, &a, &b); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~