Compilare: user.cpp: In member function ‘void Normalization::normalize()’: user.cpp:107:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < ord.size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:129:17: warning: unused variable ‘x’ [-Wunused-variable] int x; ^ user.cpp:133:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nrm.ord.size() > N + M) ^ user.cpp:144:17: warning: variable ‘edg1’ set but not used [-Wunused-but-set-variable] int edg1, edg2; ^ user.cpp:144:23: warning: variable ‘edg2’ set but not used [-Wunused-but-set-variable] int edg1, edg2; ^ user.cpp:163:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < edges[0][i].size(); j++) ^ user.cpp:164:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = j + 1; k < edges[0][i].size(); k++) ^ user.cpp:168:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < edges[1][i].size(); j++) ^ user.cpp:169:53: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int k = j + 1; k < edges[1][i].size(); k++) ^ user.cpp:125:9: warning: unused variable ‘dif’ [-Wunused-variable] int dif = 0; ^ user.cpp:116:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("entanglement.in", "r", stdin); ^ user.cpp:117:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("entanglement.out", "w", stdout); ^ user.cpp:120:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &op, &N, &M, &K); ^ user.cpp:130:34: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &a[i][j]); ^