Submission #241494

#	Time	Username	Problem	Language	Result	Execution time	Memory
241494		marlicu	KOVANICE (COI15_kovanice)	C++14	0 / 100	139 ms	17656 KiB

kovanice

#include <bits/stdc++.h>

using namespace std;

const int MAXN = 3e5 + 5;

int n, m, v;
int pripada[MAXN];
vector <int> veze[MAXN];
bool ispisan[MAXN];
int vrsta[MAXN];

void init() {
    for (int i = 1; i <= m; i++) {
        pripada[i] = i;
    }
}

void ispis() {
    for (int i = 1; i <= m; i++) {
        cout << pripada[i] << " ";
    }
    cout << '\n';

    memset(ispisan, 0, sizeof(ispisan));

    for (int i = 1; i <= m; i++) {
        if (ispisan[i]) continue;
        cout << i << " ";

        int t = i;
        while (veze[t].size()) {
            cout << veze[t][0] << " ";
            t = veze[t][0];
            ispisan[t] = true;
        }

        cout << '\n';
        ispisan[i] = true;
    }
}

void konacan_ispis() {
    int x;
    for (int i = 1; i <= m; i++) {
        x = pripada[i];
        if (!vrsta[x]) cout << "?\n";
        else cout << "K" << vrsta[x] << "\n";
    }
}

void vaganje() {
    string s;
    cin >> s;

    int a, b = 0;
    char znak;

    unsigned t = -1;
    while (++t < s.size()) {
        if (s[t] == '=' || s[t] == '<') {
            znak = s[t];
            a = b;
            b = 0;
        }
        else {
            b *= 10;
            b += (s[t] - '0');
        }
    }

    //cout << a << " " << znak << " " << b << '\n';

    a = pripada[a];
    b = pripada[b];

    if (znak == '=') {
        if (a < b) pripada[b] = a;
        else pripada[a] = b;
    }

    else {
        veze[a].push_back(b);
    }

    //ispis();
}

void odredivanje() {
    vector <int> niz;
    memset(ispisan, 0, sizeof(ispisan));

    for (int i = 1; i <= m; i++) {
        int t = pripada[i];
        if (ispisan[t]) continue;
        ispisan[t] = true;
        niz.clear();
        niz.push_back(t);
        while (veze[t].size()) {
            t = veze[t][0];
            ispisan[t] = true;
            niz.push_back(t);
        }

        /*
        cout << niz.size() << " : ";
        for (auto x : niz) {
            cout << x << " ";
        }
        cout << '\n';
        */

        if (niz.size() == n) {
            for (int j = 0; j < n; j++) {
                vrsta[niz[j]] = j + 1;
            }
        }
    }
}

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

    cin >> n >> m >> v;
    init();
    for (int i = 0; i < v; i++) {
        vaganje();
    }

    odredivanje();
    konacan_ispis();

    return 0;
}

Compilation message (stderr)

kovanice.cpp: In function 'void odredivanje()':
kovanice.cpp:113:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         if (niz.size() == n) {
             ~~~~~~~~~~~^~~~
kovanice.cpp: In function 'void vaganje()':
kovanice.cpp:77:5: warning: 'znak' may be used uninitialized in this function [-Wmaybe-uninitialized]
     if (znak == '=') {
     ^~
kovanice.cpp:74:7: warning: 'a' may be used uninitialized in this function [-Wmaybe-uninitialized]
     a = pripada[a];
     ~~^~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 40
• Subtask 3: 0 / 10
• Subtask 4: 0 / 40