Main.cc: In function ‘int main()’: Main.cc:8:32: warning: too many arguments for format [-Wformat-extra-args] scanf("%d%d",&H[i],&L[i],&R[i]); ^ Main.cc:19:12: error: ISO C++ forbids comparison between pointer and integer [-fpermissive] if(R[j]>R{i}&&L[j]<=r[i]+1) ^ Main.cc:19:13: error: expected ‘)’ before ‘{’ token if(R[j]>R{i}&&L[j]<=r[i]+1) ^ Main.cc:8:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&H[i],&L[i],&R[i]); ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~