Compilare: main.cpp: In function 'void add(int, int)': main.cpp:39:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 39 | for(int o=1;o<=dp[b].size();o++) | ~^~~~~~~~~~~~~~ main.cpp:44:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 44 | for(int o=1;o<=dp[a].size();o++) | ~^~~~~~~~~~~~~~ main.cpp:49:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 49 | for(int o=1;o<=dp[a].size();o++) | ~^~~~~~~~~~~~~~ main.cpp:51:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 51 | for(int u=1;u<=dp[b].size();u++) | ~^~~~~~~~~~~~~~