#include <bits/stdc++.h> using namespace std; const int N = 2e5 + 1; int n, c[N], last[N], dp[N]; int main(int argc, char **argv) { int t; scanf("%d", &t); while (t-- != 0) { scanf("%d", &n); for (int i = 0; i < n; ++i) scanf("%d", &c[i]); memset(last, -1, sizeof last); last[c[0]] = 0; for (int i = 1; i < n; ++i) { dp[i] = dp[i - 1] + 1; if (last[c[i]] != -1) dp[i] = min(dp[i], dp[last[c[i]]] + 1); last[c[i]] = i; } printf("%d\n", dp[n - 1]); } return 0; }
Standard input is empty
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