Submission #487617

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
487617	2021-11-16 09:40:08	KazamaHoang	Trobojnica (COCI19_trobojnica)	C++14	110 / 110	55 ms	7500 KiB

trobojnica

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#include <bits/stdc++.h>
using namespace std;
int n;
int nxt[200005], col[200005], cnt[4];
set<int> pos;
int ans[200005][3];
int main() {
    cin.tie(0)->sync_with_stdio(0);
    cin >> n;
    for (int i = 0; i < n; ++ i) {
        char ch;
        cin >> ch;
        col[i] = ch - '0';
        nxt[i] = (i + 1) % n;
        ++ cnt[col[i]];
    }
    int x = 0;
    for (int i = 0, y; i < n - 3; ++ i) {
        int numCol = (cnt[1] > 0) + (cnt[2] > 0) + (cnt[3] > 0);
        if (numCol == 1) {
            cout << "NE\n";
            return 0;
        }
        while (1) {
            y = nxt[x];
            if (col[x] == col[y]) x = nxt[x];
            else if (cnt[col[x]] == 1 && cnt[col[y]] == 1) x = nxt[x];
 
 
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• Subtask 1: 20 / 20
• Subtask 2: 40 / 40
• Subtask 3: 50 / 50