View Compilation Error

0_0_3987913_12515.cpp: In function `int main()':
0_0_3987913_12515.cpp:53: error: `k' undeclared (first use this function)
0_0_3987913_12515.cpp:53: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_3987913_12515.cpp:54: error: `i' undeclared (first use this function)
0_0_3987913_12515.cpp:55: error: `j' undeclared (first use this function)
0_0_3987913_12515.cpp:71: error: `ans' undeclared (first use this function)
0_0_3987913_12515.cpp:71: error: `D' undeclared (first use this function)
0_0_3987913_12515.cpp: At global scope:
0_0_3987913_12515.cpp:88: error: expected unqualified-id before "return"
0_0_3987913_12515.cpp:88: error: expected `,' or `;' before "return"
0_0_3987913_12515.cpp:89: error: expected declaration before '}' token