1 #include <iostream>
 2 #include <stdio.h>
 3 using namespace std;
 4
 5
 6 int main(){
 7     int n;
 8     while(scanf("%d", &n) && n != 0){
 9         int start_time, finish_time, sunrise_time, sunset_time;
10         int hour, minute;
11         int driving_time_total = 0, night_driving_time_total = 0;
12         string result = "PASS";
13         for (int i = 0; i < n; ++i) {
14             //read in times and convert to minutes
15             scanf("%d:%d", &hour, &minute);
16             sunrise_time = hour * 60 + minute;
17             scanf("%d:%d", &hour, &minute);
18             sunset_time = hour * 60 + minute;
19             scanf("%d:%d", &hour, &minute);
20             start_time = hour * 60 + minute;
21             scanf("%d:%d", &hour, &minute);
22             finish_time = hour * 60 + minute;
23             int driving_time = finish_time - start_time;
24             if(driving_time >= 120){
25                 result = "NON";
26                 continue;
27             }
28             driving_time_total += (finish_time - start_time);
29             //judge if drive at night
30             if(start_time < sunrise_time && driving_time <= 2 * (sunrise_time - start_time))
31                 night_driving_time_total += driving_time;
32             else if(finish_time > sunset_time && driving_time <= 2 * (finish_time - sunset_time))
33                 night_driving_time_total += driving_time;
34         }
35         if(driving_time_total < 50 * 60)
36             result = "NON";
37         if(night_driving_time_total < 10 * 60)
38             result = "NON";
39         cout << result << endl;
40     }
41     return 0;
42 }