View Compilation Error

0_0_7836717_22426.cpp: In function `void solve(ll, ll, ll)':
0_0_7836717_22426.cpp:30: error: `int64' undeclared (first use this function)
0_0_7836717_22426.cpp:30: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7836717_22426.cpp:30: error: expected `;' before "i"
0_0_7836717_22426.cpp:30: error: `i' undeclared (first use this function)
0_0_7836717_22426.cpp: In function `int main()':
0_0_7836717_22426.cpp:40: error: `int64' undeclared (first use this function)
0_0_7836717_22426.cpp:40: error: expected `;' before "Case"
0_0_7836717_22426.cpp:42: error: `Case' undeclared (first use this function)
0_0_7836717_22426.cpp:45: error: expected `;' before "i"
0_0_7836717_22426.cpp:45: error: `i' undeclared (first use this function)