Compilare: main.cpp: In function 'int logic(std::vector<int>&, std::vector<int>&)': main.cpp:9:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<a.size(); ++i) ~^~~~~~~~~ main.cpp:11:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (act2 < b.size() && b[act2] < a[i]) ~~~~~^~~~~~~~~~ main.cpp:14:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] while (act2 < b.size() && b[act2] <= a[i]) ~~~~~^~~~~~~~~~ main.cpp:18:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (act2 != b.size()) ++ret; ~~~~~^~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:23:37: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("portofel.in","r",stdin); ^ main.cpp:24:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("portofel.out","w",stdout); ^ main.cpp:25:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&t); ^ main.cpp:28:29: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&n,&m); ^ main.cpp:34:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ main.cpp:42:27: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^