Compilare: user.cpp: In function ‘void get_updates(std::vector<int>)’: user.cpp:59:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v.size();i++) ^ user.cpp:61:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<poz.size();i++) ^ user.cpp:62:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(poz[i].size()>=z) ^ user.cpp:64:42: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j=0;j+z<=poz[i].size();j++) ^ user.cpp:68:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(j+z<poz[i].size()) d=poz[i][j+z]; ^ user.cpp: In function ‘int main()’: user.cpp:100:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("russky.in", "r", stdin); ^ user.cpp:101:39: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("russky.out", "w", stdout); ^ user.cpp:102:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&z); ^ user.cpp:103:44: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for(int i=1;i<=n;i++) scanf("%d",&v[i]); ^ user.cpp:105:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&q); ^ user.cpp:109:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&l,&p); ^