Compilare: main.cpp: In function 'int main()': main.cpp:25:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 25 | for (i = 0; i < poz[a].size(); i++) { | ~~^~~~~~~~~~~~~~~ main.cpp:26:31: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for (j = i; j < poz[a].size(); j++) { | ~~^~~~~~~~~~~~~~~ main.cpp:69:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 69 | if (j < poz[a].size() && i == poz[a][j]) { | ~~^~~~~~~~~~~~~~~