146 lines
3.5 KiB
C++
146 lines
3.5 KiB
C++
#include <stdio.h>
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#include <math.h>
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#include <string.h>
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#include <iostream>
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#include <algorithm>
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using namespace std;
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int st[20][50000];
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int a[20][5];
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int s[20];
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int ans,ans1,ans2;
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void work(int h,int m,int s,int x)
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{
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int i,j,k,l;
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if(!(m>=(h%5)*12&&m<(h%5+1)*12)) return;
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st[x][h/5*3600+m*60+s]=1;
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}
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int main()
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{
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int n,i,j,k,l,m,q,w,e,r,t,num;
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while (scanf("%d",&n)!=EOF)
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{
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memset(st,0,sizeof(st));
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if (n==0) break;
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for (i=1;i<=n;i++)
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{
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scanf("%d%d%d",&a[i][1],&a[i][2],&a[i][3]);
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for (j=1;j<=60;j++)
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{
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work(a[i][1],a[i][2],a[i][3],i);
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work(a[i][1],a[i][3],a[i][2],i);
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work(a[i][2],a[i][1],a[i][3],i);
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work(a[i][2],a[i][3],a[i][1],i);
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work(a[i][3],a[i][2],a[i][1],i);
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work(a[i][3],a[i][1],a[i][2],i);
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a[i][1]=(a[i][1]+1)%60;
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a[i][2]=(a[i][2]+1)%60;
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a[i][3]=(a[i][3]+1)%60;
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}
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}
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num=0;
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j=0;
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i=0;
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memset(s,0,sizeof(s));
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while (1)
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{
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for (j=1;j<=n;j++)
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{
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if (st[j][i]==1)
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{
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if (s[j]==0) num++;
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s[j]++;
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}
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}
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i++;
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if (num==n) break;
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}
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i--;j=0;
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int flag=0;
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while (1)
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{
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for (k=1;k<=n;k++)
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{
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if (st[k][j]==1)
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{
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if (s[k]==1)
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{
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flag=1;
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num--;
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}
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s[k]--;
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}
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}
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if (flag) break;
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j++;
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}
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for (k=1;k<=n;k++)
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{
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if (st[k][j]==1)
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{
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if (s[k]==0)
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{
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num++;
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}
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s[k]++;
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}
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}
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ans=i-j+1;
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ans1=j;
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ans2=i;
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while (1)
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{
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while (1)
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{
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for (k=1;k<=n;k++)
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{
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if (st[k][j]==1)
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{
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if (s[k]==1)
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{
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num--;
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}
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s[k]--;
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}
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}
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j++;
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if (num<n) break;
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}
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if (i-j+2<ans)
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{
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ans=i-j+2;
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ans1=j-1;
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ans2=i;
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}
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while (1)
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{
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i++;
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if (i>45000)break;
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for (k=1;k<=n;k++)
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{
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if (st[k][i]==1)
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{
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if (s[k]==0)
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{
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num++;
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}
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s[k]++;
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}
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}
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if (num==n)break;
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}
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if (i>45000)break;
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}
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int h1,m1,s1,h2,m2,s2;
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h1=ans1/3600;
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m1=ans1-h1*3600;
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m1=m1/60;
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s1=ans1-h1*3600-m1*60;
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h2=ans2/3600;
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m2=ans2-h2*3600;
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m2=m2/60;
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s2=ans2-h2*3600-m2*60;
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printf("%02d:%02d:%02d %02d:%02d:%02d\n",h1,m1,s1,h2,m2,s2);
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}
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return 0;
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}
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