Compilare: main.cpp: In function 'int main()': main.cpp:22:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size(); i++){ ~~^~~~~~~~~~ main.cpp:23:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v.size(); j++){ ~~^~~~~~~~~~ main.cpp:24:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < v.size(); k++){ ~~^~~~~~~~~~ main.cpp:32:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < v.size(); i++){ ~~^~~~~~~~~~ main.cpp:33:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < v.size(); j++){ ~~^~~~~~~~~~ main.cpp:34:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = 0; k < v.size(); k++){ ~~^~~~~~~~~~