#include #include #include #include #include #include #include #include #include #include using ll = long long; using namespace std; const int inf = 1e6 + 7; /* 00:00:00 = 0 01:05:27 = 3927 02:10:54 = 7854 03:16:21 = 10837 04:21:49 = 15709 05:27:16 = 19636 06:32:43 = 23563 07:38:10 = 27490 08:43:38 = 31418 09:49:05 = 35345 10:54:32 = 39272 12:00:00 = 43200 */ int main(){ int a , b; cin >> a >> b; a %= 12; b %= 60; int second = 3600*a + 60*b; int ans = inf; int array[] = {0,3927,7854,10837,15709,19636,23563,27490,31418,35345,39272,43200}; for(int i = 0; i < 12; i++){ int t = array[i] - second; if(t < 0)continue; ans = min(ans , t); } if(ans == inf){ for(int i = 0; i < 12; i++){ int t = array[i] - second + 43200; if(t < 0)continue; ans = min(ans , t); } } cout << ans << endl; return 0; }