//ww:compile
package main;
type instant = struct { sec: i64, nsec: i64 };
export fn add(i: instant, x: i64) instant = {
    let r: instant;
    if (x == 0i64) {
        r.sec = i.sec; r.nsec = i.nsec;
        return r;
    };
    if (x > 0i64) {
        r.sec = i.sec + x; r.nsec = i.nsec;
        return r;
    };
    r.sec = i.sec - 1i64; r.nsec = i.nsec + x;
    return r;
};
export fn main() i32 = { return 0; };