c-gcc, 185 bytes

Result

AC

Duration

516ms

Code [DL]

y,z;main(){int a[z=12];for(;z--;)scanf("%d",a+z);for(z=9;z--;)a[z]-=a[9+z%3];printf("%d",(a[3]*a[7]*a[2]+a[6]*a[1]*a[5]+a[0]*a[4]*a[8]-a[6]*a[4]*a[2]-a[0]*a[7]*a[5]-a[3]*a[1]*a[8])/6);}

stdin

04 05 91
76 70 48
61 76 52
91 63 91

stdout

10962

stderr

/tmp/code.c:1:1: warning: data definition has no type or storage class
 y,z;main(){int a[z=12];for(;z--;)scanf("%d",a+z);for(z=9;z--;)a[z]-=a[9+z%3];printf("%d",(a[3]*a[7]*a[2]+a[6]*a[1]*a[5]+a[0]*a[4]*a[8]-a[6]*a[4]*a[2]-a[0]*a[7]*a[5]-a[3]*a[1]*a[8])/6);}
 ^
/tmp/code.c:1:1: warning: type defaults to 'int' in declaration of 'y' [-Wimplicit-int]
/tmp/code.c:1:3: warning: type defaults to 'int' in declaration of 'z' [-Wimplicit-int]
 y,z;main(){int a[z=12];for(;z--;)scanf("%d",a+z);for(z=9;z--;)a[z]-=a[9+z%3];printf("%d",(a[3]*a[7]*a[2]+a[6]*a[1]*a[5]+a[0]*a[4]*a[8]-a[6]*a[4]*a[2]-a[0]*a[7]*a[5]-a[3]*a[1]*a[8])/6);}
   ^
/tmp/code.c:1:5: warning: return type defaults to 'int' [-Wimplicit-int]
 y,z;main(){int a[z=12];for(;z--;)scanf("%d",a+z);for(z=9;z--;)a[z]-=a[9+z%3];printf("%d",(a[3]*a[7]*a[2]+a[6]*a[1]*a[5]+a[0]*a[4]*a[8]-a[6]*a[4]*a[2]-a[0]*a[7]*a[5]-a[3]*a[1]*a[8])/6);}
     ^~~~
/tmp/code.c: In function 'main':
/tmp/code.c:1:34: warning: implicit declaration of function 'scanf' [-Wimplicit-function-declaration]
 y,z;main(){int a[z=12];for(;z--;)scanf("%d",a+z);for(z=9;z--;)a[z]-=a[9+z%3];printf("%d",(a[3]*a[7]*a[2]+a[6]*a[1]*a[5]+a[0]*a[4]*a[8]-a[6]*a[4]*a[2]-a[0]*a[7]*a[5]-a[3]*a[1]*a[8])/6);}
                                  ^~~~~
/tmp/code.c:1:34: warning: incompatible implicit declaration of built-in function 'scanf'
/tmp/code.c:1:34: note: include '<stdio.h>' or provide a declaration of 'scanf'
/tmp/code.c:1:78: warning: implicit declaration of function 'printf' [-Wimplicit-function-declaration]
 y,z;main(){int a[z=12];for(;z--;)scanf("%d",a+z);for(z=9;z--;)a[z]-=a[9+z%3];printf("%d",(a[3]*a[7]*a[2]+a[6]*a[1]*a[5]+a[0]*a[4]*a[8]-a[6]*a[4]*a[2]-a[0]*a[7]*a[5]-a[3]*a[1]*a[8])/6);}
                                                                              ^~~~~~
/tmp/code.c:1:78: warning: incompatible implicit declaration of built-in function 'printf'
/tmp/code.c:1:78: note: include '<stdio.h>' or provide a declaration of 'printf'

strace