View Compilation Error

0_0_1542164_1570.cpp: In function `bool judge(int, int)':
0_0_1542164_1570.cpp:18: error: `r' undeclared (first use this function)
0_0_1542164_1570.cpp:18: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1542164_1570.cpp:18: error: `c' undeclared (first use this function)
0_0_1542164_1570.cpp: In function `int bfs()':
0_0_1542164_1570.cpp:39: error: expected primary-expression before "int"
0_0_1542164_1570.cpp:39: error: expected `;' before "int"
0_0_1542164_1570.cpp:61: error: expected `}' at end of input