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By Ashiq
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Comments

Anonymous said…
#include
using namespace std;

int main() {
ios::sync_with_stdio(false);
cin.tie(nullptr);

int t;
cin >> t;
while (t--) {
int n, m;
cin >> n >> m;

set st; // store chemicals
for (int i = 0; i < n; i++) {
long long x;
cin >> x;
st.insert(x);
}

vector> rules(m);
for (int i = 0; i < m; i++) {
cin >> rules[i][0] >> rules[i][1] >> rules[i][2];
}

bool changed = true;

// repeat until no new chemical is added
while (changed) {
changed = false;

for (auto &r : rules) {
long long x = r[0], y = r[1], z = r[2];

if (st.count(x) && st.count(y) && !st.count(z)) {
st.insert(z);
changed = true; // new chemical added
}
}
}

cout << st.size() << "\n";
}

return 0;
}
November 15, 2025 at 5:07 PM

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