public void solve(InputReader in, OutputWriter out) {
int n = in.nextInt();
int[][] g = new int[n][n];
for (int i = 0; i < n; i++) {
for (int j = 0; j < n; j++) {
g[i][j] = in.nextInt();
}
}
Queue<int[]> queue =
new PriorityQueue<int[]>(
1,
new Comparator<int[]>() {
@Override
public int compare(int[] o1, int[] o2) {
return o1[1] - o2[1];
}
});
queue.add(new int[] {0, 0});
boolean[] visited = new boolean[n];
int res = 0;
while (!queue.isEmpty()) {
int[] head = queue.remove();
int node = head[0];
int dist = head[1];
if (!visited[node]) {
res += dist;
visited[node] = true;
for (int i = 0; i < n; i++) {
if (!visited[i]) {
queue.add(new int[] {i, g[node][i]});
}
}
}
}
out.println(res);
}
public int printSmiles(int smiles) {
boolean[][] visited = new boolean[2001][2001];
Queue<Integer> posQ = new LinkedList<>();
Queue<Integer> copyQ = new LinkedList<>();
Queue<Integer> countQ = new LinkedList<>();
posQ.add(1);
copyQ.add(0);
countQ.add(0);
while (true) {
int pos = posQ.poll();
int copy = copyQ.poll();
if (pos == smiles) break;
int count = countQ.poll();
if (visited[pos][copy]) continue;
visited[pos][copy] = true;
if (pos < smiles) {
// copy
posQ.add(pos);
copyQ.add(pos);
countQ.add(count + 1);
// paste
posQ.add(pos + copy);
copyQ.add(copy);
countQ.add(count + 1);
}
// delete
if (pos - 1 >= 0) {
posQ.add(pos - 1);
copyQ.add(copy);
countQ.add(count + 1);
}
}
return countQ.poll();
}