Compilare: main.cpp: In function 'void join(int, int, int)': main.cpp:57:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 57 | for(int i = 0; i < v[aux].size(); i++) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void solve()': main.cpp:75:21: warning: narrowing conversion of 'i' from 'll' {aka 'long long int'} to 'int' [-Wnarrowing] 75 | vec.pb({i, j, a[i][j]}); | ^ main.cpp:75:24: warning: narrowing conversion of 'j' from 'll' {aka 'long long int'} to 'int' [-Wnarrowing] 75 | vec.pb({i, j, a[i][j]}); | ^ main.cpp:84:18: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<lol>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 84 | for(i = 0; i < vec.size(); i++) | ~~^~~~~~~~~~~~