Compilare: user.cpp: In function ‘void InApm(int)’: user.cpp:12:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<g[x].size();++i) ^ user.cpp: In function ‘void prim()’: user.cpp:93:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<g[x].size();++j) ^ user.cpp: In function ‘void read()’: user.cpp:71:28: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm.in","r",stdin); ^ user.cpp:72:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d\n",&n,&m); ^ user.cpp:75:31: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d",&x,&y,&c); ^ user.cpp: In function ‘void write()’: user.cpp:102:30: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("apm.out","w",stdout); ^