Compilare: user.cpp: In function ‘int main()’: user.cpp:108:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < R[now.second].size(); ++i) ^ user.cpp:122:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < R[now.second].size(); ++i) ^ user.cpp:126:60: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < R[now.second].size(); ++j) ^ user.cpp:144:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < R[now.second].size(); ++i) ^ user.cpp:146:64: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1; j < R[now.second].size(); ++j) ^ user.cpp:150:68: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 1; k < R[now.second].size(); ++k) ^ user.cpp:193:56: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 1; i < R[now.second].size(); ++i) ^ user.cpp:208:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < R[now.second].size(); ++i) ^ user.cpp:212:60: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < R[now.second].size(); ++j) ^ user.cpp:217:60: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 1; j < R[now.second].size(); ++j) ^ user.cpp:240:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < R[now.second].size(); ++i) ^ user.cpp:242:64: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1; j < R[now.second].size(); ++j) ^ user.cpp:246:68: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 0; k < R[now.second].size(); ++k) ^ user.cpp:257:72: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int k = 1; k < R[now.second].size(); ++k) ^ user.cpp:287:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < R[now.second].size(); ++i) ^ user.cpp:289:64: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = i + 1; j < R[now.second].size(); ++j) ^ user.cpp:295:72: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]