0_0_35704395_1446.cpp: In function 'long long int kuaisumi(long long int, long long int)':
0_0_35704395_1446.cpp:12:24: error: 'mod' was not declared in this scope
ans=ans*a%mod;
^
0_0_35704395_1446.cpp:13:16: error: 'mod' was not declared in this scope
a=a*a%mod;
^
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