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impl Solution {
pub fn max_rest_days(n: i64, p: i64, l: i64, t: i64) -> i64 {
let tasks: i64 = (n + 6) / 7;
let pairs: i64 = tasks / 2;
let odd: i64 = tasks % 2;
let pair_pts: i64 = l + 2 * t;
let pair_total: i64 = pairs * pair_pts;
let mut study_days: i64;
if p <= pair_total {
if p % pair_pts == 0 {
study_days = p / pair_pts;
} else {
study_days = p / pair_pts + 1;
}
} else {
study_days = pairs;
let mut rem: i64 = if p >= pair_total { p - pair_total } else { 0 };
if odd == 1 {
let one_day_pts: i64 = l + t;
if rem <= one_day_pts {
study_days = study_days + 1;
rem = 0;
} else {
study_days = study_days + 1;
rem = rem - one_day_pts;
}
}
if rem > 0 {
if rem % l == 0 {
study_days = study_days + rem / l;
} else {
study_days = study_days + rem / l + 1;
}
}
}
n - study_days
}
}