Compilare: main.c: In function 'main': main.c:13:81: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'short unsigned int *' [-Wformat=] freopen("dijkstra.in","r",stdin),freopen("dijkstra.out","w",stdout),scanf("%d%d",&n,&m); ^ main.c:15:17: warning: format '%d' expects argument of type 'int *', but argument 2 has type 'short unsigned int *' [-Wformat=] scanf("%d%d%d",&u,&w,&f); ^ main.c:15:19: warning: format '%d' expects argument of type 'int *', but argument 3 has type 'short unsigned int *' [-Wformat=] scanf("%d%d%d",&u,&w,&f); ^ main.c:15:21: warning: format '%d' expects argument of type 'int *', but argument 4 has type 'short unsigned int *' [-Wformat=] scanf("%d%d%d",&u,&w,&f); ^ main.c:28:17: warning: operation on 'h[(int)w]' may be undefined [-Wsequence-point] h[w]^=h[f]^=h[w]^=h[f],p[h[w]]=w,p[h[f]]=f; ^~ main.c:36:32: warning: operation on 'h[(int)w]' may be undefined [-Wsequence-point] f=w>>1,h[w]^=h[f]^=h[w]^=h[f],p[h[w]]=w,p[h[f]]=f; ^~ main.c:13:5: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.in","r",stdin),freopen("dijkstra.out","w",stdout),scanf("%d%d",&n,&m); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:13:38: warning: ignoring return value of 'freopen', declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.in","r",stdin),freopen("dijkstra.out","w",stdout),scanf("%d%d",&n,&m); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ main.c:13:73: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] freopen("dijkstra.in","r",stdin),freopen("dijkstra.out","w",stdout),scanf("%d%d",&n,&m); ^~~~~~~~~~~~~~~~~~~ main.c:15:9: warning: ignoring return value of 'scanf', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d",&u,&w,&f); ^~~~~~~~~~~~~~~~~~~~~~~~