Compilare: main.cpp: In function 'void read()': main.cpp:42:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < m.length();) ~~^~~~~~~~~~~~ main.cpp:69:55: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(m[j] >= '0' && m[j] <= '9' && j < m.length()) ~~^~~~~~~~~~~~ main.cpp: In function 'std::vector<long long int> reuniune(std::vector<long long int>, std::vector<long long int>)': main.cpp:89:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < a.size() && j < b.size()) ~~^~~~~~~~~~ main.cpp:89:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < a.size() && j < b.size()) ~~^~~~~~~~~~ main.cpp:103:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < a.size()) ~~^~~~~~~~~~ main.cpp:105:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(j < b.size()) ~~^~~~~~~~~~ main.cpp: In function 'std::vector<long long int> intersectie(std::vector<long long int>, std::vector<long long int>)': main.cpp:117:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < a.size() && j < b.size()) ~~^~~~~~~~~~ main.cpp:117:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(i < a.size() && j < b.size()) ~~^~~~~~~~~~ main.cpp: In function 'void print_ans(std::vector<long long int>)': main.cpp:178:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ans.size(); i++) ~~^~~~~~~~~~~~ main.cpp: In function 'void read()': main.cpp:77:14: warning: 'e' may be used uninitialized in this function [-Wmaybe-uninitialized] myset(e, f, s, d); ~~~~~^~~~~~~~~~~~