0_0_33149771_30857.cpp: In function 'int main()':
0_0_33149771_30857.cpp:20:24: error: 'n' was not declared in this scope
while(~scanf("%d%d", &n, &m) && n)
^
0_0_33149771_30857.cpp:20:28: error: 'm' was not declared in this scope
while(~scanf("%d%d", &n, &m) && n)
^
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