Compilare: main.cpp: In function 'void set_onion(int)': main.cpp:48:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 48 | for (auto [y,c]:v[x]){ | ^ main.cpp: At global scope: main.cpp:54:11: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts' 54 | void merj(auto &a, auto b, int c){ | ^~~~ main.cpp:54:20: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts' 54 | void merj(auto &a, auto b, int c){ | ^~~~ main.cpp: In function 'void merj(auto:1&, auto:2, int)': main.cpp:55:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 55 | auto &[amx1, amx2]=a; | ^ main.cpp:56:10: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 56 | auto [bmx1, bmx2]=b; | ^ main.cpp: In function 'void find_maxs(int)': main.cpp:65:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 65 | for (auto [y,c]:v[x]){ | ^ main.cpp: In function 'void find_maxs2(int)': main.cpp:74:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 74 | for (auto [y,c]:v[x]){ | ^ main.cpp:76:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 76 | auto &[d,u]=mx[y]; | ^ main.cpp: In function 'void du(int, long long int, int)': main.cpp:96:10: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 96 | auto [d,u]=mx[y]; | ^ main.cpp:99:9: warning: unused variable 'distd' [-Wunused-variable] 99 | ll &distd=mp[d].F; | ^~~~~ main.cpp:100:9: warning: unused variable 'distu' [-Wunused-variable] 100 | ll &distu=mp[u].F; | ^~~~~ main.cpp: In function 'void dfs(int)': main.cpp:116:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 116 | for (auto [y,c]:v[x]){ | ^ main.cpp: In function 'void build_set()': main.cpp:124:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 124 | for (auto [dist,y]:V[0]){ | ^ main.cpp:130:22: 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] 130 | while(s[0].size()!=k){ | ~~~~~~~~~~~^~~