0_0_27540629_25638.cpp: In function 'int main()':
0_0_27540629_25638.cpp:9:9: error: 'cin' was not declared in this scope
while (cin >> m >> n) {
^
0_0_27540629_25638.cpp:24:3: error: 'cout' was not declared in this scope
cout << max_sum << endl;
^
0_0_27540629_25638.cpp:24:22: error: 'endl' was not declared in this scope
cout << max_sum << endl;
^
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