poj 1695 DP

#include<cstdio>#include<cstring>#define INF 0x3f3f3f3f#define MIN(x,y) ((x)>(y)?(y):(x))int dp[36][36][36];int d[36][36];int main(){int T;scanf("%d",&T);while(T--){int n;scanf("%d",&n);for(int i=1;i<n;i++)for(int j=i+1;j<=n;j++)scanf("%d",&d[i][j]);memset(dp,0x3f,sizeof(dp));dp[1][1][1]=0;for(int k=1;k<=n;k++)for(int j=k;j<=n;j++)for(int i=j;i<=n;i++){dp[i+1][j][k]=MIN(dp[i+1][j][k],dp[i][j][k]+d[i][i+1]);dp[i+1][i][k]=MIN(dp[i+1][i][k],dp[i][j][k]+d[j][i+1]);dp[i+1][i][j]=MIN(dp[i+1][i][j],dp[i][j][k]+d[k][i+1]); }int res=INF;for(int i=1;i<n;i++)    for(int j=1;j<n;j++)    res=MIN(res,dp[n][i][j]);    printf("%d\n",res);} return 0; }