Compilare: main.cpp: In function 'void solve()': main.cpp:40:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(k < bits.length()) { ~~^~~~~~~~~~~~~~~ main.cpp:42:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = k; i < bits.length(); i++) { ~~^~~~~~~~~~~~~~~ main.cpp:52:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i <= bits.length(); i++) bst[i] = inf; ~~^~~~~~~~~~~~~~~~ main.cpp:54:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int p = 1; p < bits.length(); p++) { ~~^~~~~~~~~~~~~~~ main.cpp:63:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < update[p].size(); i++) { ~~^~~~~~~~~~~~~~~~~~