0_0_8788435_11771.cpp: In function `int main()':
0_0_8788435_11771.cpp:7: error: `_int64' undeclared (first use this function)
0_0_8788435_11771.cpp:7: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_8788435_11771.cpp:7: error: expected `;' before "ans"
0_0_8788435_11771.cpp:12: error: `ans' undeclared (first use this function)
0_0_8788435_11771.cpp: At global scope:
0_0_8788435_11771.cpp:28: error: expected unqualified-id before '--' token
0_0_8788435_11771.cpp:28: error: expected `,' or `;' before '--' token
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