Compilare: user.cpp: In function ‘void Read()’: user.cpp:12:9: warning: unused variable ‘i’ [-Wunused-variable] int i; ^ user.cpp: In function ‘void SolveA()’: user.cpp:24:9: warning: unused variable ‘i’ [-Wunused-variable] int i,NJ=0; ^ user.cpp: In function ‘void Solve()’: user.cpp:64:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(Ind[aux]<V[aux].size()) ^ user.cpp: In function ‘void Read()’: user.cpp:13:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&N); ^ user.cpp:17:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^ user.cpp: In function ‘int main()’: user.cpp:70:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("concurs2.in","r",stdin); ^ user.cpp:71:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("concurs2.out","w",stdout); ^