0_0_28354490_1668.cpp: In function 'int main()':
0_0_28354490_1668.cpp:14:9: error: 'ans' was not declared in this scope
ans=0;
^
0_0_28354490_1668.cpp:15:23: error: 'n' was not declared in this scope
scanf("%d%d",&n,&m);
^
0_0_28354490_1668.cpp:15:26: error: 'm' was not declared in this scope
scanf("%d%d",&n,&m);
^
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