Compilare: main.cpp: In function 'void calc_dp_aux(std::vector<int>)': main.cpp:17:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 17 | for(int i = 0; i < fii.size(); i++){ | ~~^~~~~~~~~~~~ main.cpp:22:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(int len = 1; len < fii.size(); len++){ | ~~~~^~~~~~~~~~~~ main.cpp:23:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for(int i = 0; i < fii.size() - len; i++){ | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'void dfs(int, int)': main.cpp:34:14: warning: unused variable 'fii_i' [-Wunused-variable] 34 | int sum, fii_i, fii_j; | ^~~~~ main.cpp:34:21: warning: unused variable 'fii_j' [-Wunused-variable] 34 | int sum, fii_i, fii_j; | ^~~~~