Compilare: main.cpp: In function 'int main()': main.cpp:15:26: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 15 | for (size_t i = 0, x; i < n; ++i) | ~~^~~ main.cpp:16:24: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 16 | for (size_t j = 0; j < n; ++j) { | ~~^~~ main.cpp:24:23: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 24 | for (size_t i = 2; i <= n; ++i) { | ~~^~~~ main.cpp:28:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17' 28 | for (auto& [x, y] : pos[!(i % 2)]) | ^ main.cpp:39:23: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 39 | for (size_t i = 1; i <= n; ++i) | ~~^~~~