Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:18:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < graf[t].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:78:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < graf[1].size(); j++) ^ user.cpp:93:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < graf[1].size() && !solutie; j++) ^ user.cpp:107:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < graf[1].size() && !solutie; j++) ^ user.cpp:121:49: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < graf[1].size() && !solutie; j++) ^