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54: int c; c=a; a=b; b=a;
00401819 mov eax,dword ptr [ebp+8]
0040181C mov dword ptr [ebp-4],eax
0040181F mov ecx,dword ptr [ebp+0Ch]
00401822 mov dword ptr [ebp+8],ecx
00401825 mov edx,dword ptr [ebp+8]
00401828 mov dword ptr [ebp+0Ch],edx
58: a=a+b; b=a-b; a=a-b;
00401849 mov eax,dword ptr [ebp+8]
0040184C add eax,dword ptr [ebp+0Ch]
0040184F mov dword ptr [ebp+8],eax
00401852 mov ecx,dword ptr [ebp+8]
00401855 sub ecx,dword ptr [ebp+0Ch]
00401858 mov dword ptr [ebp+0Ch],ecx
0040185B mov edx,dword ptr [ebp+8]
0040185E sub edx,dword ptr [ebp+0Ch]
00401861 mov dword ptr [ebp+8],edx