Compilare: main.cpp: In function 'void solve()': main.cpp:87:41: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(b_en[en[e].pos] == 0 && e < en.size()) ~~^~~~~~~~~~~ main.cpp:89:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(fr[f].val <= en[e].pos && f < fr.size() && e < en.size()) ~~^~~~~~~~~~~ main.cpp:89:57: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(fr[f].val <= en[e].pos && f < fr.size() && e < en.size()) ~~^~~~~~~~~~~ main.cpp:104:57: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(fr[f].val > en[e].val && nrEn < k2 && e < en.size() && f < fr.size()) ~~^~~~~~~~~~~ main.cpp:104:74: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(fr[f].val > en[e].val && nrEn < k2 && e < en.size() && f < fr.size()) ~~^~~~~~~~~~~ main.cpp:111:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(f < fr.size()) ~~^~~~~~~~~~~ main.cpp:118:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else if(e < en.size() && nrEn < k2) ~~^~~~~~~~~~~