Compilare: main.cpp: In function 'int main()': main.cpp:91:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 91 | for (int i = 0; i<ans.size(); i++) { | ~^~~~~~~~~~~ main.cpp:92:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 92 | for (int j = 0; j<ans[i].size(); j++) { | ~^~~~~~~~~~~~~~ main.cpp:123:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 123 | for (int i = 0; i<ies.size(); i++) { | ~^~~~~~~~~~~ main.cpp:127:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 127 | for (int i = ies.size(); i<intru.size(); i++) { | ~^~~~~~~~~~~~~ main.cpp:131:26: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 131 | for (int i = 0; i<intru.size(); i++) { | ~^~~~~~~~~~~~~ main.cpp:135:37: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 135 | for (int i = intru.size(); i<ies.size(); i++) { | ~^~~~~~~~~~~