Compilare: main.cpp: In function 'int main()': main.cpp:54:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<v1.size();i++) ~^~~~~~~~~~ main.cpp:29:22: warning: unused variable 'poz' [-Wunused-variable] int j,i,n,m,x,xa,poz,start; ^~~ main.cpp:27:35: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sarpe2.in","r",stdin); ^ main.cpp:28:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("sarpe2.out","w",stdout); ^ main.cpp:31:24: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m); ^ main.cpp:36:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ main.cpp:45:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ main.cpp:47:13: warning: 'start' may be used uninitialized in this function [-Wmaybe-uninitialized] if(x==start) ^~ main.cpp:41:10: warning: 'xa' may be used uninitialized in this function [-Wmaybe-uninitialized] v[xa]=-1; ~~~~~^~~