Compilare: user.c: In function ‘main’: user.c:4:9: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.in","r",stdin),freopen("maxflow.out","w",stdout),scanf("%d%d",&n,&m); ^ user.c:4:41: warning: ignoring return value of ‘freopen’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.in","r",stdin),freopen("maxflow.out","w",stdout),scanf("%d%d",&n,&m); ^ user.c:4:73: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] freopen("maxflow.in","r",stdin),freopen("maxflow.out","w",stdout),scanf("%d%d",&n,&m); ^ user.c:6:11: warning: ignoring return value of ‘scanf’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&i,&j,&l),g[i][w[i]++]=j,g[j][w[j]++]=i,e[i][j]+=l; ^