Compilare: main.cpp: In function 'void task1()': main.cpp:23:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for (int i=0; i<x.size(); i++){ | ~^~~~~~~~~ main.cpp: In function 'void task2()': main.cpp:32:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 32 | for (int i=0; i<x.size(); i++){ | ~^~~~~~~~~ main.cpp:43:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for (int j=0; j<changes[i].size(); j++){ | ~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:67:18: warning: comparison of integer expressions of different signedness: 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare] 67 | if (x.size() < k) k = x.size(); | ~~~~~~~~~^~~