View Compilation Error

136917_0_16944.cpp:2:22: algorithm.h: No such file or directory
136917_0_16944.cpp: In function `int main()':
136917_0_16944.cpp:48: error: `sort' undeclared (first use this function)
136917_0_16944.cpp:48: error: (Each undeclared identifier is reported only once for each function it appears in.)
136917_0_16944.cpp:50: error: 'struct s' has no member named 'y'