Compilare: user.cpp: In function ‘std::vector<std::vector<std::vector<int> > > generateVariations(int)’: user.cpp:12:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < variations.size(); i++) ^ user.cpp:15:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < variations[i].size(); j++) ^ user.cpp:25:47: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < variations[i][j].size(); k++) ^ user.cpp: In function ‘std::vector<int> count(int)’: user.cpp:40:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < variations.size(); i++) ^ user.cpp:42:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < variations[i].size(); j++) ^ user.cpp:44:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < variations[i][j].size(); k++) ^ user.cpp: In function ‘void print(std::ostream&, std::vector<int>)’: user.cpp:79:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size() - 1; i++) ^ user.cpp:85:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:131:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < cnt.size(); i++) ^ user.cpp:97:12: warning: unused variable ‘cntsum’ [-Wunused-variable] int N, S, cntsum = 0; ^