View Compilation Error

0_0_7926804_4975.cpp:25:29: tr1/unordered_set: No such file or directory
0_0_7926804_4975.cpp:61: error: `tr1' has not been declared
0_0_7926804_4975.cpp:61: error: expected constructor, destructor, or type conversion before '<' token
0_0_7926804_4975.cpp:61: error: expected `,' or `;' before '<' token
0_0_7926804_4975.cpp: In function `bool check(std::queue<std::pair<long long int, int>, std::deque<std::pair<long long int, int>, std::allocator<std::pair<long long int, int> > > >&, int)':
0_0_7926804_4975.cpp:111: error: `s' undeclared (first use this function)
0_0_7926804_4975.cpp:111: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_7926804_4975.cpp: In function `int main()':
0_0_7926804_4975.cpp:129: error: `s' undeclared (first use this function)