Compilare: main.cpp: In function 'void dfs(int)': main.cpp:27:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < graf[nod].size(); i++){ ~~^~~~~~~~~~~~~~~~~~ main.cpp:32:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j <= cuvinte[curent].size() + 1; j++) ~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:43:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < input.size(); i++){ ~~^~~~~~~~~~~~~~ main.cpp:58:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(isalnum(input[i]) and i + 1 < input.size() and input[i + 1] != '('){ ~~~~~~^~~~~~~~~~~~~~ main.cpp:69:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < s.size()){ ~~^~~~~~~~~~