Compilare: main.cpp: In function 'int main()': main.cpp:21:8: warning: init-statement in selection statements only available with '-std=c++17' or '-std=gnu++17' 21 | if (int k = (boys[i] - boys[j]) * 2 - (i - j); !mp.count(k)) { | ^~~ main.cpp:30:10: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 30 | auto& [x, y] = mp[k]; | ^