Compilare: main.cpp: In function 'void solve(int, int)': main.cpp:122:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 122 | for(int i = 0 ; i < A.size() ; i++) | ~~^~~~~~~~~~ main.cpp:142:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 142 | for(int i = 0 ; i < A.size() ; i++) | ~~^~~~~~~~~~ main.cpp:149:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 149 | for(int i = 1 ; i <= A.size() ; i++) | ~~^~~~~~~~~~~ main.cpp:150:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 150 | if(i == A.size() || A[b[i].idx] != A[b[i - 1].idx]) | ~~^~~~~~~~~~~