0_0_35980378_15225.cpp: In function 'node muti(node, node)':
0_0_35980378_15225.cpp:9:30: error: 'memset' was not declared in this scope
memset(c.m, 0, sizeof c.m);
^
0_0_35980378_15225.cpp: In function 'node pow_k(node, int)':
0_0_35980378_15225.cpp:18:34: error: 'memset' was not declared in this scope
memset(ans.m, 0, sizeof ans.m);
^
0_0_35980378_15225.cpp: In function 'int main()':
0_0_35980378_15225.cpp:36:38: error: 'memset' was not declared in this scope
memset(ans.m, 0, sizeof ans.m);
^
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