Compilare: main.cpp: In function 'int main()': main.cpp:41:30: warning: comparison of integer expressions of different signedness: 'size_t' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 41 | for (size_t j = 0; j <= k; j++) | ~~^~~~ main.cpp:57:30: warning: comparison of integer expressions of different signedness: 'std::vector<std::tuple<int, int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 57 | if (c.size() < n2+1) | ~~~~~~~~~^~~~~~