#include using namespace std; typedef long long ll; typedef vector vi; typedef vector vl; typedef pair pii; typedef pair pll; typedef int _loop_int; #define REP(i,n) for(_loop_int i=0;i<(_loop_int)(n);++i) #define FOR(i,a,b) for(_loop_int i=(_loop_int)(a);i<(_loop_int)(b);++i) #define FORR(i,a,b) for(_loop_int i=(_loop_int)(b)-1;i>=(_loop_int)(a);--i) #define DEBUG(x) cout<<#x<<": "< P; // volatile 付けないと誤差出てくれないの辛すぎる…… ll calc(ll d){ volatile double x = 1+4*d; volatile double s = sqrt(x); volatile ll ret = (-1+s)/2.0; return ret; } int main(){ ll t = 999999999ll; int cnt = 0; while(t>=0){ ll d = t*t+t-1ll; ll t2 = calc(d); if(t2!=t-1){ printf("%lld\n",d); cnt++; if(cnt==100000)break; } --t; } return 0; }