Compilare: main.cpp: In function 'int numar(int)': main.cpp:20:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < exp_d[p].size(); i++) { ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:40:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < expresie.size(); i++) { ~~^~~~~~~~~~~~~~~~~ main.cpp:46:9: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (i == expresie.size() - 1) exp_d.push_back(temp); ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:50:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < exp_d.size(); i++) { ~~^~~~~~~~~~~~~~ main.cpp:147:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v1.size(); i++) { ~~^~~~~~~~~~~ main.cpp:148:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < v2.size(); j++) { ~~^~~~~~~~~~~