View Compilation Error

0_0_9053425_3208.cpp:5:29: tr1/unordered_map: No such file or directory
0_0_9053425_3208.cpp:8: error: expected namespace-name before ';' token
0_0_9053425_3208.cpp:8: error: `<type error>' is not a namespace
0_0_9053425_3208.cpp:57: error: expected constructor, destructor, or type conversion before '<' token
0_0_9053425_3208.cpp:57: error: expected `,' or `;' before '<' token
0_0_9053425_3208.cpp: In function `void flood(int)':
0_0_9053425_3208.cpp:69: error: `arc' undeclared (first use this function)
0_0_9053425_3208.cpp:69: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_9053425_3208.cpp: In function `int main()':
0_0_9053425_3208.cpp:107: error: `arc' undeclared (first use this function)