Submission #211121

#	Time	Username	Problem	Language	Result	Execution time	Memory
211121		Aldas25	Trobojnica (COCI19_trobojnica)	C++14	0 / 110	4 ms	384 KiB

trobojnica

#include <bits/stdc++.h>

using namespace std;

#define FAST_IO ios_base::sync_with_stdio(0); cin.tie(nullptr)
#define FOR(i, a, b) for(int i = (a); i <= (b); i++)
#define REP(n) FOR(O, 1, (n))
#define pb push_back
#define f first
#define s second
typedef long double ld;
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<int, pii> piii;
typedef vector<int> vi;
typedef vector<pii> vii;
typedef vector<ll> vl;
typedef vector<piii> viii;

const int MAXN = 500100, MAXK = 60;
const ll MOD = 1e9+7;
const int INF = 1e8;
const ld PI = asin(1) * 2;

void setIO () {
    FAST_IO;
}

void setIO (string s) {
    setIO();
 	freopen((s+".in").c_str(),"r",stdin);
	freopen((s+".out").c_str(),"w",stdout);
}


int n;
deque<pair<int, pii>> q;
vector<pair<pii, int>> ans;

int main() {
	setIO();

    cin >> n;
    FOR(i, 1, n) {
        int next = i+1;
        if (next > n) next = 1;
        char c; cin >> c;
        q.push_back({(c-'0'), {i, next}});
    }

    while (q.size() > 3) {
        auto cur = q.front();
        q.pop_front();
        if (q.front().f != cur.f) {
            int c = 1;
            FOR(i, 1, 3) {
                if (i != q.front().f && i != cur.f) c = i;
            }
            ans.pb({{cur.s.f, q.front().s.s}, c});
            q.pop_front();
            q.push_front({c, {cur.s.f, q.front().s.s}});
        } else if (q.back().f != cur.f) {
            int c = 1;
            FOR(i, 1, 3) {
                if (i != q.front().f && i != cur.f) c = i;
            }
            ans.pb({{q.back().s.f, cur.s.s}, c});
            q.pop_back();
            q.push_back({c, {q.back().s.f, cur.s.s}});
        } else {
            cout << "NE";
            return 0;
        }
    }

    vi cols;
    while (!q.empty()) {cols.pb(q.front().f); q.pop_front();}
    FOR(i, 0, (int)cols.size()-1) {
        if (cols[i] == cols[(i+1)%((int)cols.size())]) {
            cout << "NE";
            return 0;
        }
    }

    cout << "DA\n";
    for (auto p : ans) cout << p.f.f << " " << p.f.s << " " << p.s << endl;

	return 0;
}

Compilation message (stderr)

trobojnica.cpp: In function 'void setIO(std::__cxx11::string)':
trobojnica.cpp:31:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen((s+".in").c_str(),"r",stdin);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
trobojnica.cpp:32:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
  freopen((s+".out").c_str(),"w",stdout);
  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 40
• Subtask 3: 0 / 50