Compilare: user.cpp: In function ‘int solve(int)’: user.cpp:12:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(nra>=v1.size()) return (nra+1+v1.size())/2+v2.size(); ^ user.cpp:18:23: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while(poz<v1.size()) ^ user.cpp:21:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz+x<v1.size()) ^ user.cpp: In function ‘int main()’: user.cpp:40:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mobs.in", "r", stdin); ^ user.cpp:41:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("mobs.out", "w", stdout); ^ user.cpp:43:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(scanf("%d",&t);t;t--) ^ user.cpp:46:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n,&a,&b); ^ user.cpp:52:27: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^