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View Compilation Error

0_0_39378134_25896.cpp: In function 'int main()':
0_0_39378134_25896.cpp:72:9: error: 'n' was not declared in this scope
   72 |         n = read(), m = read(), tot = 0;
      |         ^
0_0_39378134_25896.cpp:72:21: error: 'm' was not declared in this scope
   72 |         n = read(), m = read(), tot = 0;
      |                     ^


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