Compilare: main.cpp: In function 'void build(char)': main.cpp:72:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 72 | for(int i=0;i<cpsA.size();i++) | ~^~~~~~~~~~~~ main.cpp:73:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 73 | for(int j=0;j<cpsA[i].size();j++) | ~^~~~~~~~~~~~~~~ main.cpp:75:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 75 | for(int i=0;i<cpsB.size();i++) | ~^~~~~~~~~~~~ main.cpp:76:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 76 | for(int j=0;j<cpsB[i].size();j++) | ~^~~~~~~~~~~~~~~ main.cpp:78:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 78 | for(int i=0;i<vA.size();i++) | ~^~~~~~~~~~