0_0_13501864_1686.cpp: In function 'int A(int)':
0_0_13501864_1686.cpp:41:5: error: redefinition of 'int A(int)'
int A(int n)
^
0_0_13501864_1686.cpp:4:5: note: 'int A(int)' previously defined here
int A(int n)
^
0_0_13501864_1686.cpp: In function 'int main()':
0_0_13501864_1686.cpp:54:5: error: redefinition of 'int main()'
int main(void)
^
0_0_13501864_1686.cpp:17:5: note: 'int main()' previously defined here
int main(void)
^
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