Compilare: user.cpp: In function ‘void solve()’: user.cpp:44:30: warning: suggest parentheses around ‘&&’ within ‘||’ [-Wparentheses] for(i=1;i<=m;i++){if(S[X[i]]&&T[Y[i]]||S[Y[i]]&&T[X[i]])A[++A[0]]=i;} ^ user.cpp: In function ‘void read()’: user.cpp:8:52: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] void read(){int i,c;freopen("critice.in","r",stdin);scanf("%d%d",&n,&m);for(i=1;i<=m;i++){scanf("%d%d%d",X+i,Y+i,&c);G[X[i]][D[X[i]]++]=Y[i];G[Y[i]][D[Y[i]]++]=X[i];C[X[i]][Y[i]]=C[Y[i]][X[i]]=c;}} ^ user.cpp:8:72: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] void read(){int i,c;freopen("critice.in","r",stdin);scanf("%d%d",&n,&m);for(i=1;i<=m;i++){scanf("%d%d%d",X+i,Y+i,&c);G[X[i]][D[X[i]]++]=Y[i];G[Y[i]][D[Y[i]]++]=X[i];C[X[i]][Y[i]]=C[Y[i]][X[i]]=c;}} ^ user.cpp:8:117: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] void read(){int i,c;freopen("critice.in","r",stdin);scanf("%d%d",&n,&m);for(i=1;i<=m;i++){scanf("%d%d%d",X+i,Y+i,&c);G[X[i]][D[X[i]]++]=Y[i];G[Y[i]][D[Y[i]]++]=X[i];C[X[i]][Y[i]]=C[Y[i]][X[i]]=c;}} ^ user.cpp: In function ‘void write()’: user.cpp:46:53: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] void write(){int i;freopen("critice.out","w",stdout);printf("%d\n",A[0]);for(i=1;i<=A[0];i++)printf("%d\n",A[i]);} ^