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View Compilation Error

0_0_39456257_13712.cpp: In function 'int main()':
0_0_39456257_13712.cpp:247:27: error: 'fastpow' was not declared in this scope
  247 |                 inv[i][j]=fastpow(c[i][j],mod1-2,mod1);
      |                           ^~~~~~~


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