expo.cpp:1:27: error: bits/stdc++h\.h: No such file or directory expo.cpp:4: error: 'ifstream' does not name a type expo.cpp:5: error: 'ofstream' does not name a type expo.cpp: In function 'int main()': expo.cpp:12: error: conflicting declaration 'int st' expo.cpp:11: error: 'st' has a previous declaration as 'long long int st' expo.cpp:12: error: conflicting declaration 'int dr' expo.cpp:11: error: 'dr' has a previous declaration as 'long long int dr' expo.cpp:13: error: 'fin' was not declared in this scope expo.cpp:16: error: 'dt' was not declared in this scope expo.cpp:23: error: expected ';' before '}' token expo.cpp:26: error: 'sr' was not declared in this scope expo.cpp:29: error: 'fout' was not declared in this scope