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关键是Havel定理,贪心一次ac,晒代码#include<iostream> #include<algorithm> #include<cstdio> #include<cstring> using namespace std; int g[11][11]; int n; struct node { int pos; int degree; }; node d[11]; int cmp(node a,node b) { return (a.degree>b.degree); } int main() { //freopen("1.txt","r",stdin); int tc,i,j,temp; scanf("%d",&tc); while(tc--) { scanf("%d",&n); for(i=0;i<n;i++) { scanf("%d",&temp); d[i].degree=temp; d[i].pos=i; } sort(d,d+n,cmp); memset(g,0,sizeof(g)); bool flag=true; //solve for(i=0;i<n;i++) { sort(d,d+n,cmp); if(d[0].degree==0)break; for(j=1;j<n;j++) { d[j].degree--; if(d[j].degree<0) { flag=false; break; } g[d[0].pos][d[j].pos]=g[d[j].pos][d[0].pos]=1; d[0].degree--; if(d[0].degree==0)break; } if(!flag) break; } if(!flag) printf("NO\n"); else { printf("YES\n"); for(i=0;i<n;i++) for(j=0;j<n;j++) { if(j<n-1) printf("%d ",g[i][j]); else printf("%d\n",g[i][j]); } } printf("\n"); } return 0; } Followed by: Post your reply here: |
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