Compilare: main.cpp: In function 'void set_onion(int)': main.cpp:51:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 51 | for (auto [y,c]:v[x]){ | ^ main.cpp: At global scope: main.cpp:57:11: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts' 57 | void merj(auto &a, auto b, int c){ | ^~~~ main.cpp:57:20: warning: use of 'auto' in parameter declaration only available with '-fconcepts-ts' 57 | void merj(auto &a, auto b, int c){ | ^~~~ main.cpp: In function 'void merj(auto:1&, auto:2, int)': main.cpp:58:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 58 | auto &[amx1, amx2]=a; | ^ main.cpp:59:10: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 59 | auto [bmx1, bmx2]=b; | ^ main.cpp: In function 'void find_maxs(int)': main.cpp:68:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 68 | for (auto [y,c]:v[x]){ | ^ main.cpp: In function 'void find_maxs2(int)': main.cpp:77:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 77 | for (auto [y,c]:v[x]){ | ^ main.cpp:79:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 79 | auto &[d,u]=mx[y]; | ^ main.cpp: In function 'void du(int, long long int, int)': main.cpp:99:10: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 99 | auto [d,u]=mx[y]; | ^ main.cpp:102:9: warning: unused variable 'distd' [-Wunused-variable] 102 | ll &distd=mp[d].F; | ^~~~~ main.cpp:103:9: warning: unused variable 'distu' [-Wunused-variable] 103 | ll &distu=mp[u].F; | ^~~~~ main.cpp: In function 'void dfs(int)': main.cpp:119:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 119 | for (auto [y,c]:v[x]){ | ^ main.cpp: In function 'void build_set()': main.cpp:127:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 127 | for (auto [dist,y]:V[0]){ | ^ main.cpp:133:22: 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] 133 | while(s[0].size()!=k){ | ~~~~~~~~~~~^~~