oj.uz

Submission #222395

# Submission time Handle Problem Language Result Execution time Memory
222395 2020-04-13T06:27:25 Z lyc Checker (COCI19_checker) C++14
110 / 110
 702 ms 36196 KB 
#include <bits/stdc++.h>
using namespace std;

#define SZ(x) (int)(x).size()
#define FOR(i,a,b) for(int i=(a);i<=(b);++i)
#define RFOR(i,a,b) for (int i=(a);i>=(b);--i)

const int MX_N = 2e5+5;
using ii = pair<int,int>;

int ST;

int N;
int deg[MX_N];
set<ii> hull;
map<ii,int> edges;
queue<set<ii>::iterator> q;

bool check(set<ii>::iterator it) {
    if (deg[it->first] != 2) return false;
    //cout << "CHECKING " << it->first << " " << it->second << endl;
    auto prv = (it == hull.begin() ? prev(hull.end()) : prev(it));
    auto nxt = (next(it) == hull.end() ? hull.begin() : next(it));
    ii e = ii(prv->first, nxt->first);
    //cout << "\t edge " << e.first << " " << e.second << endl;
    if (e.first > e.second) swap(e.first, e.second);
    //cout << "\t good? " << edges.count(e) << endl;
    return edges.count(e);
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    cin >> ST;

    cin >> N;
    FOR(i,1,N){
        char C; cin >> C;
        edges[ii(i,i+1)] = C;
        hull.insert(ii(i,C-'0'));
        deg[i] = 2;
    }
    FOR(i,1,N-3){
        int X, Y, C; cin >> X >> Y >> C;
        if (X > Y) swap(X,Y);
        edges[ii(X,Y)] = C;
        ++deg[X];
        ++deg[Y];
    }

    //set<ii>::iterator P = hull.end();
    for (auto it = hull.begin(); it != hull.end(); ++it) {
        //cout << "TRY " << it->first << " " << it->second << endl;
        if (check(it)) {
            //P = it;
            q.push(it);
        }
    }

    bool isPat = true;
    while (!q.empty() && SZ(hull) > 2) {
        auto P = q.front(); q.pop();
        auto prv = (P == hull.begin() ? prev(hull.end()) : prev(P));
        auto nxt = (next(P) == hull.end() ? hull.begin() : next(P));

        ii e = ii(prv->first, nxt->first);
        if (e.first > e.second) swap(e.first, e.second);
        //cout << "HULL IS NOW " << SZ(hull) << " :: P " << P->first << " " << P->second << " :: E " << e.first << " " << e.second << endl;
        int a = prv->second, b = P->second, c = edges[e];
        isPat &= (a != b && a != c && b != c);

        hull.erase(P);
        --deg[e.first];
        --deg[e.second];

        ii nw = ii(prv->first, c);
        hull.erase(prv);
        hull.insert(nw);

        //for (auto& x : hull) cout << x.first << " " << x.second << " || ";
        //cout << endl;

        if (check(nxt)) q.push(nxt);
        if (check(prev(nxt))) q.push(prev(nxt));
    }

    if (SZ(hull) != 2) {
        cout << "neispravna triangulacija" << '\n';
    } else if (!isPat) {
        cout << "neispravno bojenje" << '\n';
    } else {
        cout << "tocno" << '\n';
    }
}

Subtask #1
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct

Subtask #2
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 10 ms 768 KB Output is correct
9 Correct 7 ms 768 KB Output is correct
10 Correct 9 ms 640 KB Output is correct
11 Correct 6 ms 640 KB Output is correct
12 Correct 8 ms 768 KB Output is correct
13 Correct 7 ms 640 KB Output is correct
14 Correct 7 ms 768 KB Output is correct

Subtask #3
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 702 ms 35964 KB Output is correct
2 Correct 674 ms 35968 KB Output is correct
3 Correct 698 ms 35960 KB Output is correct
4 Correct 640 ms 35960 KB Output is correct
5 Correct 630 ms 36076 KB Output is correct
6 Correct 500 ms 35576 KB Output is correct
7 Correct 464 ms 35576 KB Output is correct
8 Correct 433 ms 35512 KB Output is correct
9 Correct 361 ms 35576 KB Output is correct

Subtask #4
23.0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 670 ms 36088 KB Output is correct
2 Correct 650 ms 36064 KB Output is correct
3 Correct 646 ms 36088 KB Output is correct
4 Correct 649 ms 35960 KB Output is correct
5 Correct 674 ms 35960 KB Output is correct
6 Correct 447 ms 35576 KB Output is correct
7 Correct 473 ms 35644 KB Output is correct
8 Correct 469 ms 35576 KB Output is correct
9 Correct 464 ms 35576 KB Output is correct

Subtask #5
35.0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 5 ms 384 KB Output is correct
4 Correct 5 ms 384 KB Output is correct
5 Correct 5 ms 384 KB Output is correct
6 Correct 5 ms 384 KB Output is correct
7 Correct 5 ms 384 KB Output is correct
8 Correct 10 ms 768 KB Output is correct
9 Correct 7 ms 768 KB Output is correct
10 Correct 9 ms 640 KB Output is correct
11 Correct 6 ms 640 KB Output is correct
12 Correct 8 ms 768 KB Output is correct
13 Correct 7 ms 640 KB Output is correct
14 Correct 7 ms 768 KB Output is correct
15 Correct 702 ms 35964 KB Output is correct
16 Correct 674 ms 35968 KB Output is correct
17 Correct 698 ms 35960 KB Output is correct
18 Correct 640 ms 35960 KB Output is correct
19 Correct 630 ms 36076 KB Output is correct
20 Correct 500 ms 35576 KB Output is correct
21 Correct 464 ms 35576 KB Output is correct
22 Correct 433 ms 35512 KB Output is correct
23 Correct 361 ms 35576 KB Output is correct
24 Correct 670 ms 36088 KB Output is correct
25 Correct 650 ms 36064 KB Output is correct
26 Correct 646 ms 36088 KB Output is correct
27 Correct 649 ms 35960 KB Output is correct
28 Correct 674 ms 35960 KB Output is correct
29 Correct 447 ms 35576 KB Output is correct
30 Correct 473 ms 35644 KB Output is correct
31 Correct 469 ms 35576 KB Output is correct
32 Correct 464 ms 35576 KB Output is correct
33 Correct 674 ms 36196 KB Output is correct
34 Correct 661 ms 35960 KB Output is correct
35 Correct 682 ms 36196 KB Output is correct
36 Correct 624 ms 35960 KB Output is correct
37 Correct 683 ms 35960 KB Output is correct
38 Correct 648 ms 36088 KB Output is correct
39 Correct 645 ms 36124 KB Output is correct
40 Correct 463 ms 35552 KB Output is correct
41 Correct 494 ms 35704 KB Output is correct
42 Correct 406 ms 35544 KB Output is correct
43 Correct 465 ms 35576 KB Output is correct