0_0_20676050_3378.cpp: In function 'int main()':
0_0_20676050_3378.cpp:9:38: error: 'memset' was not declared in this scope
memset ( a, 0 , sizeof ( a ) ) ;
^
0_0_20676050_3378.cpp:27:33: error: expected primary-expression before '=' token
f [ i ] [ j ] + = a [ i ] [ j ] ;
^
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