0_0_33594418_18480.cpp: In function 'node mul(node, node, int)':
0_0_33594418_18480.cpp:13:34: error: 'memset' was not declared in this scope
memset(temp.m, 0, sizeof(temp.m));
^
0_0_33594418_18480.cpp: In function 'node qu(node, ll, ll)':
0_0_33594418_18480.cpp:28:32: error: 'memset' was not declared in this scope
memset(ans.m, 0, sizeof(ans.m));
^
0_0_33594418_18480.cpp: In function 'int main()':
0_0_33594418_18480.cpp:45:33: error: 'memset' was not declared in this scope
memset(res.m, 0, sizeof(res.m));
^
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