0_0_29231377_21035.cpp: In function 'int main()':
0_0_29231377_21035.cpp:51:25: error: 'n' was not declared in this scope
while(~scanf("%d%d",&n,&m))
^
0_0_29231377_21035.cpp:51:28: error: 'm' was not declared in this scope
while(~scanf("%d%d",&n,&m))
^
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