import std;

void main () {
    long L, R;
    int M;
    readln.read(L, R, M);
    solve(L, R, M);
}

void solve (long L, long R, int M) {
    if (M < L) {
        writeln(0);
        return;
    }

    long[] factorial = new long[](M+1);
    factorial[0] = 1 % M;
    foreach (i; 1..M+1) {
        factorial[i] = i*factorial[i-1] % M;
    }

    long ans = 0;
    long product = 1;
    foreach (i; 1..L+1) {
        product *= factorial[i]; product %= M;
    }

    for (long i = L+1; i <= min(M, R); i++) {
        ans += product; ans %= M;
        product *= factorial[i]; product %= M;
    }

    writeln(ans);
}

void read(T...)(string S, ref T args) {
    auto buf = S.split;
    foreach (i, ref arg; args) {
        arg = buf[i].to!(typeof(arg));
    }
}