0_0_27333658_22655.cpp: In function 'int main()':
0_0_27333658_22655.cpp:22:9: error: 'cin' was not declared in this scope
while (cin>>m>>n)
^
0_0_27333658_22655.cpp:29:31: error: 'memset' was not declared in this scope
memset(mark, 0, sizeof(mark));
^
0_0_27333658_22655.cpp:41:3: error: 'cout' was not declared in this scope
cout << sum << endl;
^
0_0_27333658_22655.cpp:41:18: error: 'endl' was not declared in this scope
cout << sum << endl;
^
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