Compilare: main.cpp: In function 'int main()': main.cpp:32:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = 0; j < A[i].size(); j++){ ~~^~~~~~~~~~~~~ main.cpp:49:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = lc; j < A[ln].size(); j++){ ~~^~~~~~~~~~~~~~ main.cpp:60:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j == A[ln].size()) tempsel[st.top().first] = false, st.pop(); ~~^~~~~~~~~~~~~~~ main.cpp:63:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j = lc; j < A[ln].size(); j++){ ~~^~~~~~~~~~~~~~ main.cpp:74:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j == A[ln].size()) tempsel[st.top().first] = false, st.pop(); ~~^~~~~~~~~~~~~~~ main.cpp:20:30: warning: unused variable 'l' [-Wunused-variable] int i, j, n, m, e, x, y, l, ln, lc, nurm, ct = 0; ^