37 lines
691 B
C++
37 lines
691 B
C++
#include <bits/stdc++.h>
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using namespace std;
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int main() {
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int n, m;
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cin >> n;
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set<string> store1;
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set<string> store2;
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set<string> out;
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for (int i = 0; i < n; i++) {
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string temp;
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cin >> temp;
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store1.insert(temp);
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}
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cin >> m;
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for (int i = 0; i < m; i++) {
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string temp;
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cin >> temp;
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store2.insert(temp);
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}
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for (string x : store1) {
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if (!store2.count(x)) {
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out.insert(x);
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}
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}
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for (string x : store2) {
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if (!store1.count(x)) {
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out.insert(x);
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}
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}
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cout<<out.size()<<endl;
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for (string x : out) {
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cout<<x<<endl;
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}
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} |