urgenta.cpp:9: error: 'tuple' was not declared in this scope urgenta.cpp:9: error: template argument 1 is invalid urgenta.cpp:9: error: template argument 2 is invalid urgenta.cpp: In function 'int main()': urgenta.cpp:40: error: 'edges' was not declared in this scope urgenta.cpp:40: error: 'make_tuple' was not declared in this scope urgenta.cpp:44: error: 'edges' was not declared in this scope urgenta.cpp:50: error: 'get' was not declared in this scope urgenta.cpp:79: error: 'get' was not declared in this scope