View Compilation Error

164671_0_26010.cpp: In function `int main()':
164671_0_26010.cpp:8: error: `_int64' undeclared (first use this function)
164671_0_26010.cpp:8: error: (Each undeclared identifier is reported only once for each function it appears in.)
164671_0_26010.cpp:8: error: expected `;' before "max"
164671_0_26010.cpp:12: error: expected `;' before "sum"
164671_0_26010.cpp:21: error: `max' undeclared (first use this function)
164671_0_26010.cpp:28: error: `sum' undeclared (first use this function)