P1045 压位60pts TLE求助

#include <bits/stdc++.h>
#define ll long long
using namespace std;
ll mson[3100010], l;
void mul(ll x) {
	for (int i = 1; i <= l; i ++) {
		mson[i] *= x;
	}
	for (int i = 1; i <= l; i ++) {
		if (mson[i] > 9) {
			mson[i + 1] += mson[i] / 10;
			mson[i] %= 10;
		}
	}
	if (mson[l + 1]){
		l ++;
		while (mson[l] >= 10){
			mson[l + 1] += mson[l] / 10;
			mson[l] %= 10;
			l ++;
		}
	}
}
int main() {
	int p;
	scanf("%d",&p);
	mson[1] = l = 1;
	for (int i = 1; i <= p / 40; i ++) {
		mul(1099511627776);
	}
	p %= 40;
	for (int i = 1;i <= p;i ++){
		mul(2);
	}
	printf("%lld\n",l);
	for (int i = 1; i <= 500; i ++) {
		if (i != 500) printf("%lld",mson[500 - i + 1]);
		else printf("%lld",mson[500 - i + 1] - 1);
		if (i % 50 == 0 && i != 500) cout << endl;
	}

	return 0;
}