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sim.java
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78 lines (75 loc) · 2.04 KB
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import java.io.*;
import java.util.*;
public class sim {
public static void main(String[] args) {
FastReader sc = new FastReader();
int t = sc.nextInt();
while(t--!=0){
int n = sc.nextInt();
int b[] = new int [n];
int a[] = new int [n];
Stack<Integer> stac = new Stack<>();
Stack<Integer> stac1 = new Stack<>();
boolean check = false;
for(int i=0;i<n;i++){
b[i] = sc.nextInt();
if(b[i]>(i+1)){
check = true;
break;
}
if(b[i]==-1){
continue;
}
else{
stac.push(i);
stac1.push(b[i]);
}
}
if(check){
System.out.println(-1);
}
else{
for(int i=n-1;i>=0;i--){
}
}
}
}
static class FastReader {
BufferedReader br;
StringTokenizer st;
public FastReader()
{
br = new BufferedReader(
new InputStreamReader(System.in));
}
String next()
{
while (st == null || !st.hasMoreElements()) {
try {
st = new StringTokenizer(br.readLine());
}
catch (IOException e) {
e.printStackTrace();
}
}
return st.nextToken();
}
int nextInt() { return Integer.parseInt(next()); }
long nextLong() { return Long.parseLong(next()); }
double nextDouble()
{
return Double.parseDouble(next());
}
String nextLine()
{
String str = "";
try {
str = br.readLine();
}
catch (IOException e) {
e.printStackTrace();
}
return str;
}
}
}