Compilare: main.cpp: In function 'void dfs(int)': main.cpp:26:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 26 | for(j=0; j<v[k].size(); j++) | ~^~~~~~~~~~~~ main.cpp: In function 'void ctc(int)': main.cpp:47:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 47 | for(j=0;j<w[k].size();j++) | ~^~~~~~~~~~~~ main.cpp: In function 'void citire()': main.cpp:92:22: 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<v[i].size(); j++) | ~^~~~~~~~~~~~ main.cpp:116:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 116 | for(i=0; i<solutie.size(); i++) | ~^~~~~~~~~~~~~~~ main.cpp:118:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 118 | for(int j=0; j<solutie[i].size(); j++) | ~^~~~~~~~~~~~~~~~~~ main.cpp:64:9: warning: unused variable 'nr' [-Wunused-variable] 64 | int nr = 0; | ^~