Compilare: main.cpp: In function 'int main()': main.cpp:74:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 74 | for (i = k1 + 1; i < fr.size(); i++) | ~~^~~~~~~~~~~ main.cpp:76:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | for (i = 1; i < nt.size(); i++) | ~~^~~~~~~~~~~ main.cpp:78:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 78 | for (i = 1; i < d.size(); i++) | ~~^~~~~~~~~~ main.cpp:82:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 82 | for (i = 0; i < inter.size(); i++) | ~~^~~~~~~~~~~~~~ main.cpp:83:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 83 | if (k1 - i < fr.size()) | ~~~~~~~^~~~~~~~~~~ main.cpp:29:15: warning: unused variable 'k' [-Wunused-variable] 29 | int i, j, k; | ^