program atcoder322_1
  read(5,*)N,M
  if(N<=1) then
     K=0
  else
     K=N*(N-1)/2
  end if
  if(M<=1) then
     K=K+0
  else
     K=K+M*(M-1)/2
  end if
  write(6,*)K
end program atcoder322_1
; ModuleID = 'FIRModule'
source_filename = "FIRModule"
target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"

@_QQcl.fba1abe475a47b39dfa59d031eb4b5f6 = linkonce constant [73 x i8] c"/home/ubuntu/Downloads/TheStack_IR/Collated/Fortran/Source_2015/source.f\00"
@_QQEnvironmentDefaults = local_unnamed_addr constant ptr null

define void @_QQmain() local_unnamed_addr {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  %3 = tail call ptr @_FortranAioBeginExternalListInput(i32 5, ptr nonnull @_QQcl.fba1abe475a47b39dfa59d031eb4b5f6, i32 2)
  %4 = call i1 @_FortranAioInputInteger(ptr %3, ptr nonnull %2, i32 4)
  %5 = call i1 @_FortranAioInputInteger(ptr %3, ptr nonnull %1, i32 4)
  %6 = call i32 @_FortranAioEndIoStatement(ptr %3)
  %7 = load i32, ptr %2, align 4, !tbaa !3
  %8 = icmp slt i32 %7, 2
  br i1 %8, label %13, label %9

9:                                                ; preds = %0
  %10 = add nsw i32 %7, -1
  %11 = mul i32 %10, %7
  %12 = sdiv i32 %11, 2
  br label %13

13:                                               ; preds = %0, %9
  %.0 = phi i32 [ %12, %9 ], [ 0, %0 ]
  %14 = load i32, ptr %1, align 4, !tbaa !3
  %15 = icmp slt i32 %14, 2
  br i1 %15, label %21, label %16

16:                                               ; preds = %13
  %17 = add nsw i32 %14, -1
  %18 = mul i32 %17, %14
  %19 = sdiv i32 %18, 2
  %20 = add nsw i32 %19, %.0
  br label %21

21:                                               ; preds = %13, %16
  %.1 = phi i32 [ %20, %16 ], [ %.0, %13 ]
  %22 = call ptr @_FortranAioBeginExternalListOutput(i32 6, ptr nonnull @_QQcl.fba1abe475a47b39dfa59d031eb4b5f6, i32 13)
  %23 = call i1 @_FortranAioOutputInteger32(ptr %22, i32 %.1)
  %24 = call i32 @_FortranAioEndIoStatement(ptr %22)
  ret void
}

declare ptr @_FortranAioBeginExternalListInput(i32, ptr, i32) local_unnamed_addr

declare i1 @_FortranAioInputInteger(ptr, ptr, i32) local_unnamed_addr

declare i32 @_FortranAioEndIoStatement(ptr) local_unnamed_addr

declare ptr @_FortranAioBeginExternalListOutput(i32, ptr, i32) local_unnamed_addr

declare i1 @_FortranAioOutputInteger32(ptr, i32) local_unnamed_addr

!llvm.module.flags = !{!0, !1, !2}

!0 = !{i32 2, !"Debug Info Version", i32 3}
!1 = !{i32 8, !"PIC Level", i32 2}
!2 = !{i32 7, !"PIE Level", i32 2}
!3 = !{!4, !4, i64 0}
!4 = !{!"any data access", !5, i64 0}
!5 = !{!"any access", !6, i64 0}
!6 = !{!"Flang Type TBAA Root"}
