import java.io.*;
import java.util.*;
public class tank {
static int mod = (int) 1e9 + 7;
static int mod2 = 998244353;
static FastReader sc = new FastReader(System.in);
//static Scanner sc=new Scanner(System.in);
static PrintWriter out = new PrintWriter(System.out);
static int dx[]={-1,1,0,0};
static int dy[]={0,0,-1,1};
//static int t[];
// static boolean checkk;
// static int ans_ch=0;
static HashSet<Integer> t[];
static ArrayList<Integer> chh;
static int ans=0;
static int a=0;
static int b=0;
public static void main(String[] args) throws IOException {
//int tt = sc.nextInt();
int tt = 1;
Gr1zler:
for (int WTF = 0; WTF < tt; WTF++) {
int n=sc.nextInt();
int a[]=new int[n];
Deque<Integer>pos=new LinkedList<>();
Deque<Integer>ne=new LinkedList<>();
for(int i=0;i<n;i++){
int x=sc.nextInt();
int y=sc.nextInt();
a[i]=x-y;
if(x-y>0){
pos.addLast(i);
}else if(x-y<0){
ne.addLast(i);
}
}
long ans=0;
while (!pos.isEmpty()){
System.out.println(pos);
System.out.println(ne);
System.out.println(Arrays.toString(a));
if(a[pos.getFirst()]+a[ne.getFirst()]>0){
a[pos.getFirst()]+=a[ne.getFirst()];
ans+=((Math.abs(pos.getFirst()-ne.getFirst()*Math.abs(a[ne.getFirst()]))));
ne.removeFirst();
}else if (a[pos.getFirst()]+a[ne.getFirst()]==0){
ans+=((Math.abs(pos.getFirst()-ne.getFirst()*Math.abs(a[ne.getFirst()]))));
ne.removeFirst();
pos.removeFirst();
}else{
ans+=((Math.abs(pos.getFirst()-ne.getFirst()*Math.abs(a[pos.getFirst()]))));
pos.removeFirst();
a[ne.getFirst()]+=a[pos.getFirst()];
}
}
out.println(ans);
}
out.close();
}
static class Pair{
public double x;
public double y;
public Pair(double x,double y){
this.x=x;
this.y=y;
}
}
static class Pair2{
public long x;
public long y;
public long z;
public Pair2(int x, long y,long z)
{
this.x = x;
this.y = y;
this.z = z;
}
}
static long getSqrt(long n) {
long low = 1;
long high = (long) 1E7;
long ans = 1;
while (low <= high) {
long mid = (low + high) / 2;
long sqr = mid * mid;
if (sqr <= n) {
ans = mid;
low = mid + 1;
} else {
high = mid - 1;
}
}
return ans;
}
static long gcd(long a, long b)
{
return b==0 ? a : gcd( b, a%b);
}
static long lcm(long a, long b)
{
return (a*b)/gcd( a, b);
}
static long modpow(long a,long n){
long res=1;
while(n!=0){
if ((n & 1) == 1){
res*=a;
res%=mod2;
n-=1;
}else{
a*=a;
a%=mod2;
n>>=1;
}
}
return res;
}
static void arraySortInt(int arr[]) {
ArrayList<Integer> a = new ArrayList<Integer>();
for (int i = 0; i < arr.length; i++) {
a.add(arr[i]);
}
Collections.sort(a);
for (int i = 0; i < arr.length; i++) {
arr[i] = a.get(i);
}
}
static void arraySortlong(long arr[]) {
ArrayList<Long> a = new ArrayList<>();
for (int i = 0; i < arr.length; i++) {
a.add(arr[i]);
}
Collections.sort(a);
for (int i = 0; i < arr.length; i++) {
arr[i] = a.get(i);
}
}
static class FastReader {
byte[] buf = new byte[2048];
int index, total;
InputStream in;
FastReader(InputStream is) {
in = is;
}
int scan() throws IOException {
if (index >= total) {
index = 0;
total = in.read(buf);
if (total <= 0) {
return -1;
}
}
return buf[index++];
}
String next() throws IOException {
int c;
for (c = scan(); c <= 32; c = scan()) ;
StringBuilder sb = new StringBuilder();
for (; c > 32; c = scan()) {
sb.append((char) c);
}
return sb.toString();
}
int nextInt() throws IOException {
int c, val = 0;
for (c = scan(); c <= 32; c = scan()) ;
boolean neg = c == '-';
if (c == '-' || c == '+') {
c = scan();
}
for (; c >= '0' && c <= '9'; c = scan()) {
val = (val << 3) + (val << 1) + (c & 15);
}
return neg ? -val : val;
}
long nextLong() throws IOException {
int c;
long val = 0;
for (c = scan(); c <= 32; c = scan()) ;
boolean neg = c == '-';
if (c == '-' || c == '+') {
c = scan();
}
for (; c >= '0' && c <= '9'; c = scan()) {
val = (val << 3) + (val << 1) + (c & 15);
}
return neg ? -val : val;
}
int[] nextArrInt(int n) throws IOException {
int[] a = new int[n];
for (int i = 0; i < n; i++)
a[i] = nextInt();
return a;
}
long[] nextArrLong(int n) throws IOException {
long[] a = new long[n];
for (int i = 0; i < n; i++)
a[i] = nextLong();
return a;
}
}
static class Reader {
final private int BUFFER_SIZE = 1 << 16;
private DataInputStream din;
private byte[] buffer;
private int bufferPointer, bytesRead;
public Reader() {
din = new DataInputStream(System.in);
buffer = new byte[BUFFER_SIZE];
bufferPointer = bytesRead = 0;
}
public Reader(String file_name) throws IOException {
din = new DataInputStream(
new FileInputStream(file_name));
buffer = new byte[BUFFER_SIZE];
bufferPointer = bytesRead = 0;
}
public String readLine() throws IOException {
byte[] buf = new byte[64]; // line length
int cnt = 0, c;
while ((c = read()) != -1) {
if (c == '\n') {
if (cnt != 0) {
break;
} else {
continue;
}
}
buf[cnt++] = (byte) c;
}
return new String(buf, 0, cnt);
}
public int nextInt() throws IOException {
int ret = 0;
byte c = read();
while (c <= ' ') {
c = read();
}
boolean neg = (c == '-');
if (neg)
c = read();
do {
ret = ret * 10 + c - '0';
} while ((c = read()) >= '0' && c <= '9');
if (neg)
return -ret;
return ret;
}
public long nextLong() throws IOException {
long ret = 0;
byte c = read();
while (c <= ' ')
c = read();
boolean neg = (c == '-');
if (neg)
c = read();
do {
ret = ret * 10 + c - '0';
} while ((c = read()) >= '0' && c <= '9');
if (neg)
return -ret;
return ret;
}
public double nextDouble() throws IOException {
double ret = 0, div = 1;
byte c = read();
while (c <= ' ')
c = read();
boolean neg = (c == '-');
if (neg)
c = read();
do {
ret = ret * 10 + c - '0';
} while ((c = read()) >= '0' && c <= '9');
if (c == '.') {
while ((c = read()) >= '0' && c <= '9') {
ret += (c - '0') / (div *= 10);
}
}
if (neg)
return -ret;
return ret;
}
private void fillBuffer() throws IOException {
bytesRead = din.read(buffer, bufferPointer = 0,
BUFFER_SIZE);
if (bytesRead == -1)
buffer[0] = -1;
}
private byte read() throws IOException {
if (bufferPointer == bytesRead)
fillBuffer();
return buffer[bufferPointer++];
}
public void close() throws IOException {
if (din == null)
return;
din.close();
}
public void printarray(int arr[]) {
for (int i = 0; i < arr.length; i++)
System.out.print(arr[i] + " ");
System.out.println();
}
}
}
Compilation message
bulves.java:5: error: class tank is public, should be declared in a file named tank.java
public class tank {
^
1 error
