50193. Minimum Time Difference

#include <stdio.h>
 
int abs(int n){
    if(n < 0) return -n;
    return n;
}
 
int min(int a, int b){
    if(a > b) return b;
    return a;
}
 
int getsec(int t){
    int ans = 0;
    ans += t % 100;
    t /= 100;
    ans += (t % 100) * 60;
    t /= 100;
    ans += t * 60 * 60;
    return ans;
}
 
int getstp(int s){
    int h, m;
    h = s / 3600;
    s %= 3600;
    m = s / 60;
    s %= 60;
    return (h * 10000) + (m * 100) + s;
}
 
int main(){
    int t1, t2, s1, s2;
    int temp;
    int flag = 0;
    int minsec = 100000;
    while(scanf("%d", &t1) != EOF){
        if(flag == 0){
            t2 = t1;
            flag = 1;
            continue;
        }
        //printf("%d\n%d", s1, s2);
        s1 = getsec(t1);
        s2 = getsec(t2);
        temp = abs(s1 - s2);
        //printf("%d\n", temp);
        minsec = min(temp, minsec);
        t2 = t1;
    }
    printf("%d\n", minsec);
}