Compilare: main.cpp: In function 'void solve()': main.cpp:24:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i+k <= bits.length(); i++) ~~~~^~~~~~~~~~~~~~~~ main.cpp:29:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < bits.length(); i++) ~~^~~~~~~~~~~~~~~ main.cpp:32:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < bits.length(); i++) { ~~^~~~~~~~~~~~~~~ main.cpp:34:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = i; j <= i+k && j < bits.length(); j++) { ~~^~~~~~~~~~~~~~~ main.cpp:44:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int a = 0; a < update[i].size(); a++) ~~^~~~~~~~~~~~~~~~~~ main.cpp:48:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 1; i < bits.length(); i++) ~~^~~~~~~~~~~~~~~