Compilare: user.cpp: In function ‘void dfs(int)’: user.cpp:18:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<L[nod].size();i++){ ^ user.cpp: In function ‘void dfss(int, int, int)’: user.cpp:61:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<L[nod].size();i++){ ^ user.cpp: In function ‘int main()’: user.cpp:98:34: warning: suggest parentheses around assignment used as truth value [-Wparentheses] if( t[ M[i].y ] = M[i].x ) ^ user.cpp:87:22: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d",&n); ^ user.cpp:89:31: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(f,"%d%d",&a,&b); ^