int main()
{
//limit = 6;
i64 result = 0;
i64 root = sqrt(limit);
for(i64 i = 1; i <= root; ++i){
i64 sumto = limit/i;
result += sumsquare(sumto);
if(result > nmod)
result %= nmod;
}
i64 last = limit;
for(i64 i = 2; i <= root+1; ++i){
i64 next = limit/i;
i64 cnt = last - next;
last = next;
i64 tp = sumsquare(i-1);
tp %= nmod;
cnt %= nmod;
tp *= cnt;
result+= tp;
result %= nmod;
}
printf("%lld\n", result);
}
int main()
{
int x=10,y=20;
printf("sum = %d ",sumsquare(x,y));
return 0;
}
