Compilare: main.cpp: In function 'std::vector<int> intersection(std::vector<int>, std::vector<int>)': main.cpp:25:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | while (i < a.size() && j < b.size()) { | ~~^~~~~~~~~~ main.cpp:25:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | while (i < a.size() && j < b.size()) { | ~~^~~~~~~~~~ main.cpp: In function 'std::vector<int> reunion(std::vector<int>, std::vector<int>)': main.cpp:43:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | while (i < a.size() && j < b.size()) { | ~~^~~~~~~~~~ main.cpp:43:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | while (i < a.size() && j < b.size()) { | ~~^~~~~~~~~~ main.cpp:59:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 59 | while (i < a.size()) { | ~~^~~~~~~~~~ main.cpp:63:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 63 | while (j < b.size()) { | ~~^~~~~~~~~~ main.cpp: In function 'std::vector<int> factor()': main.cpp:107:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 107 | for (int j = 0; j < vec[idx].size(); j++) | ~~^~~~~~~~~~~~~~~~~