#include <stdio.h>

int main(void) {
	int N;
	scanf("%d", &N);
	
	int prev_time = 0;
	for(int i=0; i<N; i++) {
		int hour, min, sec;
		scanf("%d:%d:%d", &hour, &min, &sec);

		int current_time = hour*60*60 + min*60 + sec;
		printf("%d\n", current_time - prev_time);
		prev_time = current_time;
	}
	return 0;
}