Compilare: main.cpp: In function 'void Karatsuba(const std::vector<long long int>&, const std::vector<long long int>&, std::vector<long long int>&)': main.cpp:24:56: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 24 | for (int index = vec1.size() >> 1, index2 = 0; index < vec1.size(); index++, index2++) { | ~~~~~~^~~~~~~~~~~~~ main.cpp:36:51: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 36 | for (int index = vec0.size(), index2 = 0; index < sol.size(); index++, index2++) { | ~~~~~~^~~~~~~~~~~~ main.cpp:42:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for (int index = 0; index < half[0][0].size(); index++) { | ~~~~~~^~~~~~~~~~~~~~~~~~~ main.cpp:50:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 50 | for (int index = 0; index < vec0.size(); index++) { | ~~~~~~^~~~~~~~~~~~~ main.cpp:56:58: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 56 | for (int index = half[0][0].size(), index2 = 0; index2 < vec0.size(); index++, index2++) { | ~~~~~~~^~~~~~~~~~~~~