Compilare: main.cpp: In function 'int main()': main.cpp:296:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 296 | for (int j = 0; j < val[i].size(); j++) { | ~~^~~~~~~~~~~~~~~ main.cpp:323:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 323 | for (int j = 0; j < val[i].size(); j++) { | ~~^~~~~~~~~~~~~~~