Compilare: user.cpp: In member function ‘void GRAPH::Dijkstra(int, std::vector<long long int>&)’: user.cpp:45:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<sarja.size(); i++) ^ user.cpp:50:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(Tmp >= (1<<n))Tmp-=(1<<n); ^ user.cpp: In function ‘int main()’: user.cpp:69:35: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("boom.in", "r", stdin); ^ user.cpp:70:37: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("boom.out", "w", stdout); ^ user.cpp:72:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ user.cpp:76:32: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%lld%d", &P, &N); ^ user.cpp:81:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d", &x); ^