Compilare: user.cpp: In function ‘int gc(int)’: user.cpp:22:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<V[x].size();j++) if ((!w[V[x][j]])&&(!viz[V[x][j]])) return 0; ^ user.cpp: In function ‘void solve(int)’: user.cpp:28:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0;j<V[x].size();j++) ^ user.cpp:29:38: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] if ((!w[V[x][j]])&&(gc(V[x][j]))&&(!viz[V[x][j]])||(nr2==n-2)) ^ user.cpp:27:9: warning: unused variable ‘i’ [-Wunused-variable] int i,j; ^ user.cpp: In function ‘void citire()’: user.cpp:14:29: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d",&x,&y); ^ user.cpp: In function ‘int main()’: user.cpp:38:34: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("asmax.in","r",stdin); ^ user.cpp:39:36: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("asmax.out","w",stdout); ^ user.cpp:40:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ user.cpp:41:50: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] for (i=1;i<=n;i++) scanf("%d",&v[i]),s=s+v[i]; ^