#include <bits/stdc++.h>
#define FOR(i, x, y) for (int i = x; i < y; i++)
typedef long long ll;
using namespace std;
int anc[300001][20], mn[300001][20], ans[300001];
int main() {
ios_base::sync_with_stdio(0);
cin.tie(0);
int n;
cin >> n;
FOR(i, 1, n + 1) {
int x;
cin >> x;
if (x > 0) {
ans[i] = x;
anc[i][0] = i;
} else {
x = -x;
int curr = i - 1;
for (int j = 19; ~j; j--) if (mn[curr][j] >= x) curr = anc[curr][j];
anc[i][0] = curr - 1;
ans[i] = ans[curr - 1];
mn[i][0] = x;
FOR(j, 1, 20) {
anc[i][j] = anc[anc[i][j - 1]][j - 1];
mn[i][j] = min(mn[i][j - 1], mn[anc[i][j - 1]][j - 1]);
}
}
}
FOR(i, 1, n + 1) cout << ans[i] << '\n';
return 0;
}
