38 lines
523 B
C++
38 lines
523 B
C++
#include <bits/stdc++.h>
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using namespace std;
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int main() {
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ifstream cin("shell.in");
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ofstream cout("shell.out");
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int N;
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cin >> N;
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int a[101], b[101], g[101];
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for (int i = 0; i < N; ++i) {
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cin >> a[i] >> b[i] >> g[i];
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}
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int ans = 0;
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for (int start : { 1, 2, 3 }) {
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int pos = start;
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int cnt = 0;
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for (int i = 0; i < N; ++i) {
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if (pos == a[i]) {
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pos = b[i];
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}
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else if (pos == b[i]) {
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pos = a[i];
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}
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if (pos == g[i]) {
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++cnt;
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}
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}
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ans = max(cnt, ans);
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}
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cout << ans;
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} |