Compilare: main.cpp: In function 'int min(std::vector<int>)': main.cpp:21:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < v.size(); i++) ~~^~~~~~~~~~ main.cpp: In function 'int max(std::vector<int>)': main.cpp:30:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < v.size(); i++) ~~^~~~~~~~~~ main.cpp: In function 'void print(std::vector<std::vector<int> >)': main.cpp:38:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); i++) ~~^~~~~~~~~~ main.cpp:40:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < v[i].size(); j++) ~~^~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:61:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v[0].size(); i++) ~~^~~~~~~~~~~~~ main.cpp:111:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < v.size(); i++) ~~^~~~~~~~~~