Tickets HDU - 1260 简单dp

#include<iostream>
using namespace std;
const int N=1e5;
int T,n;
int a[N],b[N];
int dp[N];
int main()
{
    cin>>T;
    while(T--)
    {
        cin>>n;
        for(int i=1;i<=n;i++)
            cin>>a[i];
        for(int i=1;i<=n-1;i++)
            cin>>b[i];
        dp[1]=a[1];
        for(int i=2;i<=n;i++)
            dp[i]=min(dp[i-1]+a[i],dp[i-2]+b[i-1]); 
        int ss=dp[n]+8*60*60;
        int h=ss/3600;
        ss=ss-h*3600;
        int m=ss/60;
        ss=ss-m*60;
        int s=ss;
        printf("%02d:%02d:%02d ",h,m,s);
        if(h<12) printf("am");
        else printf("pm");
        printf("\n");
    }
 }