Compilare: main.cpp: In function 'int main()': main.cpp:71:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 71 | for ( i = 1; i < p[x].size(); i++ ) | ~~^~~~~~~~~~~~~ main.cpp:79:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 79 | for ( i = 1; i < p[x].size(); i++ ) { | ~~^~~~~~~~~~~~~ main.cpp:97:24: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 97 | for ( i = 1; i < p[x].size(); i++ ) | ~~^~~~~~~~~~~~~