Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:14:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v[cr].size(); ++i) ~~^~~~~~~~~~~~~~ main.cpp: In function 'int cantoposort()': main.cpp:38:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[nod].size(); ++j) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'void tps()': main.cpp:68:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < tr[nod].size(); ++j) ~~^~~~~~~~~~~~~~~~ main.cpp:72:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < tr[nod].size(); ++j) ~~^~~~~~~~~~~~~~~~ main.cpp:65:14: warning: unused variable 'add' [-Wunused-variable] bool add = 0; ^~~ main.cpp: In function 'void tps2()': main.cpp:94:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[nod].size(); ++j) ~~^~~~~~~~~~~~~~~ main.cpp:98:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[nod].size(); ++j) ~~^~~~~~~~~~~~~~~ main.cpp:91:14: warning: unused variable 'add' [-Wunused-variable] bool add = 0; ^~~ main.cpp: In function 'int main()': main.cpp:136:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ans.size(); ++i) ~~^~~~~~~~~~~~ main.cpp:145:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v[i].size(); ++j) ~~^~~~~~~~~~~~~ main.cpp:153:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ans.size(); ++i) ~~^~~~~~~~~~~~