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DP,Why WA,好像没问题啊,我查了好几次啦 #include <stdio.h> #include <string.h> int n,m; int x[301]; void main() { int i,j,k,l,tm; int p[301][301],q[301][31]; ////p[i][j] 表示村庄i到j间修一个邮局的最小花费。 ////q[i][j] 表示前i个村庄修j个邮局的最小花费 scanf("%d%d",&n,&m); memset(q,0,sizeof(q)); for(i=0;i<n;i++) scanf("%d",&x[i]); memset(p,0,sizeof(p)); for(i=0;i<n;i++) for(j=i+1;j<n;j++) { l = i+(j-i)/2; for(k=i;k<l;k++) p[i][j] += (x[l]-x[i]); for(k=l+1;k<=j;k++) p[i][j] += (x[k]-x[l]); } for(i=0;i<n;i++) q[i][1] = p[0][i]; for(i=0;i<n;i++) for(j=2;j<=m;j++) { q[i][j] = 2000000000; for(k=j-2;k<i;k++) { tm = q[k][j-1] + p[k+1][i]; if(tm<q[i][j]) q[i][j] = tm; } } printf("%d\n",q[n-1][m]); } Followed by:
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