Compilare: user.cpp: In function ‘std::vector<int> prod(std::vector<int>, std::vector<int>)’: user.cpp:17:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned i=n/2+1; i<=n; i++) { ^ user.cpp:21:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned i=0; i<=n/2; i++){ ^ user.cpp:35:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(unsigned i = 0; i<=2*n; i++) rez.push_back(0); ^ user.cpp: In function ‘int main()’: user.cpp:67:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0; i<rez.size(); i++){ ^ user.cpp:50:40: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bacterii2.in", "r", stdin); ^ user.cpp:51:42: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("bacterii2.out", "w", stdout); ^ user.cpp:53:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &t); ^ user.cpp:57:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &na);gra = 0;for(int i=1; i<=na; i++){scanf("%d", &x); vfa[x]++;if(x>gra) gra=x;} ^ user.cpp:57:74: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &na);gra = 0;for(int i=1; i<=na; i++){scanf("%d", &x); vfa[x]++;if(x>gra) gra=x;} ^ user.cpp:58:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &nb);grb = 0;for(int i=1; i<=nb; i++){scanf("%d", &x); vfb[x]++;if(x>grb) grb=x;} ^ user.cpp:58:74: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &nb);grb = 0;for(int i=1; i<=nb; i++){scanf("%d", &x); vfb[x]++;if(x>grb) grb=x;} ^