Compilare: user.cpp: In function ‘bool cupleaza(int, int&)’: user.cpp:9:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<g[p].size(); i++) ^ user.cpp: In function ‘bool elibereaza(int)’: user.cpp:22:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (i=0; i<g[p].size(); i++) ^ user.cpp: In function ‘int main()’: user.cpp:56:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<g[i].size(); j++) ^ user.cpp:38:43: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cuplaj.in","r",stdin); ^ user.cpp:39:45: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("cuplaj.out","w",stdout); ^ user.cpp:40:39: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&n1,&n2,&m); ^ user.cpp:43:36: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&x,&y); ^