Compilare: main.cpp: In function 'void solve()': main.cpp:39:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | while ( i < d1.size() && i < d2.size() && d1[i] == d2[i] ) | ~~^~~~~~~~~~~ main.cpp:39:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | while ( i < d1.size() && i < d2.size() && d1[i] == d2[i] ) | ~~^~~~~~~~~~~ main.cpp:41:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | if ( i < d1.size() && i < d2.size() && d1[i].first == d2[i].first ) | ~~^~~~~~~~~~~ main.cpp:41:29: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 41 | if ( i < d1.size() && i < d2.size() && d1[i].first == d2[i].first ) | ~~^~~~~~~~~~~