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Cod sursa(job #640596)
#include <stdio.h>
#include <string.h>
int main()
{
freopen("farfurii.in", "r", stdin);
freopen("farfurii.out", "w", stdout);
long long k, n, i, j;
scanf("%lld %lld", &n, &k);
for (i = 2; i <= n; ++i)
if (i * (i - 1) / 2 >= k)
break;
if (i * (i - 1) / 2 == k) {
for (j = 1; j <= n - i; ++j)
printf("%lld ", j);
for (j = n; j >= n - i + 1; --j)
printf("%lld ", j);
}
else {
for (j = 1; j <= n - i; ++j)
printf("%lld ", j);
printf("%lld ", n - ((i - 1) * i / 2 - k));
for (j = n; j >= n - i + 1; --j) {
if (j == (n - ((i - 1) * i / 2 - k)))
continue;
printf("%lld ", j);
}
}
return 0;
}