public static void main(String[] args) {
InputReader in = new InputReader(System.in);
OutputWriter out = new OutputWriter(System.out);
int tc = in.nextInt();
while (tc-- > 0) {
String a = in.nextString();
String b = in.nextString();
int[][] dp = new int[2][b.length() + 1];
dp[1][0] = 1;
for (int i = 0; i <= b.length(); i++) {
dp[0][i] = i;
}
for (int i = 1, r = a.length(); i <= r; i++) {
dp[i % 2][0] = i;
for (int j = 1, c = b.length(); j <= c; j++) {
if (a.charAt(i - 1) == b.charAt(j - 1)) {
dp[i % 2][j] = dp[(i - 1) % 2][j - 1];
} else {
dp[i % 2][j] = 1 + min(dp[(i - 1) % 2][j], dp[(i - 1) % 2][j - 1], dp[i % 2][j - 1]);
}
}
}
out.println(dp[a.length() % 2][b.length()]);
}
out.flush();
out.close();
}
public static void main(String[] args) {
InputReader in = new InputReader(System.in);
OutputWriter out = new OutputWriter(System.out);
Solver solver = new Solver(in, out);
solver.solve();
in.close();
out.flush();
out.close();
}
public static void main(String[] args) {
in = new InputReader(System.in);
out = new OutputWriter(System.out);
solve();
out.flush();
in.close();
out.close();
}
public static void main(String[] argv) throws IOException
{
Task t;
boolean home = argv.length > 0 && argv[0].equals("test");
InputStream inputStream;
OutputStream outputStream;
if (home) {
inputStream = new FileInputStream(Task.filename + ".in");
outputStream = new FileOutputStream(Task.filename + ".out");
} else {
switch (Task.read) {
case 0:
inputStream = new FileInputStream(Task.filename + ".in");
outputStream = new FileOutputStream(Task.filename + ".out");
break;
case 1:
inputStream = new FileInputStream("input.txt");
outputStream = new FileOutputStream("output.txt");
break;
default:
inputStream = System.in;
outputStream = System.out;
break;
}
}
InputReader in = new InputReader(inputStream);
OutputWriter out = new OutputWriter(outputStream, home);
if (home)
do {
long time = System.currentTimeMillis();
t = new Task();
t.in = in;
t.out = out;
t.run();
out.writeln();
out.writeln("=====Time:" + (System.currentTimeMillis() - time));
out.flush();
} while (in.toNextTest());
else {
t = new Task();
t.in = in;
t.out = out;
t.run();
}
out.close();
}
public static void main(String[] args) {
InputReader in = new InputReader(System.in);
OutputWriter out = new OutputWriter(System.out);
int tc = in.nextInt();
while (tc-- > 0) {
int n = in.nextInt();
out.println(countTri(n));
}
out.flush();
out.close();
}
public static void main(String[] args) throws IOException {
// InputStream inputStream = new FileInputStream("replaceme.in");
// OutputStream outputStream = new FileOutputStream("replaceme.out");
/////////////////////////////////////////////////////////////////////
InputStream inputStream = System.in;
OutputStream outputStream = System.out;
InputReader in = new InputReader(inputStream);
OutputWriter out = new OutputWriter(outputStream);
Task solver = new Task();
solver.solve(1, in, out);
out.close();
System.exit(0);
}
public static void main(String[] args) {
InputReader in = new InputReader(System.in);
OutputWriter out = new OutputWriter(System.out);
while (true) {
int n = in.nextInt();
if (n == 0) break;
int c = 0;
while (n > 1) {
n /= 2;
c++;
}
out.println(c);
}
out.flush();
out.close();
}
public void solve(int testNumber, InputReader in, OutputWriter out) {
int n = in.nextInt(), m = in.nextInt();
boolean[] tab = new boolean[255 * 255 * 2];
for (int p = 0; p <= m; ++p) {
for (int q = 0; q <= p; ++q) {
tab[p * p + q * q] = true;
}
}
List<Integer> lst = new ArrayList<Integer>();
for (int i = 0; i < tab.length; ++i) {
if (tab[i]) {
lst.add(i);
}
}
boolean found = false;
int b = 1;
while (true) {
if ((n - 1) * b > m * m * 2) {
break;
}
for (int idx = 0; idx + n <= lst.size(); ++idx) {
int a = lst.get(idx);
if (a + (n - 1) * b > m * m * 2) {
break;
}
// out.println(a, b);
boolean flag = true;
for (int i = n - 1; i >= 0; --i) {
int x = a + i * b;
if (!tab[x]) {
flag = false;
break;
}
}
if (flag) {
out.println(a, b);
found = true;
}
}
b++;
}
if (!found) {
out.println("NONE");
}
}
void solve() {
n = in.nextInt();
m = in.nextInt();
days = new int[n + 1];
req = new int[m + 1];
for (int i = 1; i <= n; i++) days[i] = in.nextInt();
for (int i = 1; i <= m; i++) req[i] = in.nextInt();
if (!isPossible(n)) {
out.println(-1);
return;
}
int low, high, mid;
low = 1;
high = n;
mid = 1;
while (low <= high) {
mid = low + high >> 1;
boolean poss = isPossible(mid);
if (poss) {
boolean prev = isPossible(mid - 1);
if (prev) high = mid - 1;
else break;
} else low = mid + 1;
}
out.println(mid);
}
void solve() {
n = in.nextInt();
k = in.nextInt();
bit = new int[n + 1];
for (int i = 0; i < k; i++) {
int a, b;
a = in.nextInt();
b = in.nextInt();
add(a, 1);
add(b + 1, -1);
}
int[] ans = new int[n];
for (int i = 1; i <= n; i++) ans[i - 1] = query(i);
Arrays.sort(ans);
out.println(ans[n / 2]);
}
void solve(int testNumber) {
n = in.nextInt();
gain = new int[n];
lose = new int[n];
for (int i = 0; i < n; i++) gain[i] = in.nextInt();
for (int i = 0; i < n; i++) lose[i] = in.nextInt();
int max = 0;
int maxStartingPos = -1;
boolean isInfinity = false;
int infinityFrom = -1;
int crossedN = 0;
outer:
for (int start = 0; start < n; ) {
int curr = gain[start];
int startingPoint = start;
int currLen = 1;
System.out.println(
"start : "
+ start
+ ", currLen : "
+ currLen
+ ", currMaxLen : "
+ max
+ ", sP : "
+ startingPoint);
while (start < n && curr >= lose[start]) {
curr -= lose[start];
start++;
currLen++;
if (start == startingPoint) {
isInfinity = true;
infinityFrom = start;
break outer;
}
if (start == n) {
start = 0;
crossedN++;
}
curr += gain[start];
}
if (currLen > max) {
max = currLen;
maxStartingPos = startingPoint;
}
start++;
if (start >= n) {
crossedN++;
if (crossedN >= 2) break;
}
}
if (isInfinity) out.println("Infinity, from position " + infinityFrom);
else out.println("Max dist from position " + maxStartingPos);
}
static void solve() {
n = in.nextInt();
arr = new int[1001][1001];
for (int i = 0; i < n; i++) {
int x, y;
x = in.nextInt() - 1;
y = in.nextInt() - 1;
arr[x][y]++;
}
int i, j;
int start = 0;
long left, right, answer;
left = right = answer = 0;
while (start < 1000) {
i = 0;
j = start;
left = 0;
while (i < 1000 && j < 1000) {
if (arr[i][j] > 0) left++;
i++;
j++;
}
answer += (left * (left - 1) / 2);
start++;
}
start = 1;
while (start < 1000) {
i = start;
j = 0;
left = 0;
while (i < 1000 && j < 1000) {
if (arr[i][j] > 0) left++;
i++;
j++;
}
answer += (left * (left - 1) / 2);
start++;
}
start = 999;
while (start >= 0) {
i = start;
j = 0;
right = 0;
while (i >= 0 && j < 1000) {
if (arr[i][j] > 0) right++;
i--;
j++;
}
answer += (right * (right - 1) / 2);
start--;
}
start = 1;
while (start < 1000) {
i = 999;
j = start;
right = 0;
while (i >= 0 && j < 1000) {
if (arr[i][j] > 0) right++;
i--;
j++;
}
answer += (right * (right - 1) / 2);
start++;
}
out.println(answer);
}