Compilare: user.cpp: In function ‘int reuniune(int, int)’: user.cpp:23:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int main()’: user.cpp:54:22: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=0;i<m.size();i++) ^ user.cpp:32:11: warning: unused variable ‘n1’ [-Wunused-variable] int i,n1,n2,co; ^ user.cpp:32:14: warning: unused variable ‘n2’ [-Wunused-variable] int i,n1,n2,co; ^ user.cpp:32:17: warning: unused variable ‘co’ [-Wunused-variable] int i,n1,n2,co; ^ user.cpp:33:32: 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:34:34: 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); ^ user.cpp:35:25: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d",&n,&m1); ^ user.cpp:38:42: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&x[i],&y[i],&c[i]); ^