Compilare: main.cpp: In function 'void set_onion(int)': main.cpp:44:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 44 | for (auto [y,c]:v[x]){ | ^ main.cpp: At global scope: main.cpp:50:11: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts' 50 | void merj(auto &a, auto b, int c){ | ^~~~ main.cpp:50:20: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts' 50 | void merj(auto &a, auto b, int c){ | ^~~~ main.cpp: In function 'void merj(auto:1&, auto:2, int)': main.cpp:51:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 51 | auto &[amx1, amx2]=a; | ^ main.cpp:52:10: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 52 | auto [bmx1, bmx2]=b; | ^ main.cpp: In function 'void find_maxs(int)': main.cpp:61:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 61 | for (auto [y,c]:v[x]){ | ^ main.cpp: In function 'void find_maxs2(int)': main.cpp:70:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 70 | for (auto [y,c]:v[x]){ | ^ main.cpp:72:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 72 | auto &[d,u]=mx[y]; | ^ main.cpp: In function 'void du(int, long long int, int)': main.cpp:92:10: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 92 | auto [d,u]=mx[y]; | ^ main.cpp:95:9: warning: unused variable 'distd' [-Wunused-variable] 95 | ll &distd=mp[d].F; | ^~~~~ main.cpp:96:9: warning: unused variable 'distu' [-Wunused-variable] 96 | ll &distu=mp[u].F; | ^~~~~ main.cpp: In function 'void dfs(int)': main.cpp:112:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 112 | for (auto [y,c]:v[x]){ | ^ main.cpp: In function 'void build_set()': main.cpp:120:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 120 | for (auto [dist,y]:V[0]){ | ^ main.cpp:126:22: warning: comparison of integer expressions of different signedness: 'std::set<std::pair<long long int, int> >::size_type' {aka 'long unsigned int'} and 'long long int' [-Wsign-compare] 126 | while(s[0].size()!=k){ | ~~~~~~~~~~~^~~