Submission #228239

#	Time	Username	Problem	Language	Result	Execution time	Memory
228239		VEGAnn	Teoretičar (COCI18_teoreticar)	C++14	0 / 130	12100 ms	262144 KiB

teoreticar

#include <bits/stdc++.h>
#define pii pair<int,int>
#define ft first
#define sd second
#define MP make_pair
#define sz(x) ((int)x.size())
using namespace std;
typedef long long ll;
const int N = 5010;
const int M = 500100;
const int oo = 2e9;
int col[M], l, r, mrk[2][N][N], m, ans = oo, nm[M], mem[M], x[M], y[M];

mt19937 rnd(chrono::system_clock().now().time_since_epoch().count());

void potential(){
    shuffle(nm, nm + m, rnd);

    int cur = 0;

    for (int i = 0; i < max(l, r); i++)
        for (int j = 0; j < max(l, r); j++)
            mrk[0][i][j] = mrk[1][i][j] = 0;

    for (int it = 0; it < m; it++){
        int i = nm[it];

        for (int c = 0; ; c++)
            if (!mrk[0][x[i]][c] && !mrk[1][y[i]][c]){
                col[i] = c;
                cur = max(cur, c);
                mrk[0][x[i]][c] = mrk[1][y[i]][c] = 1;
                break;
            }
    }

    if (ans > cur){
        ans = cur;

        for (int i = 0; i < m; i++)
            mem[i] = col[i];
    }
}

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

    cin >> l >> r >> m;

    for (int i = 0; i < m; i++){
        cin >> x[i] >> y[i];
        x[i]--; y[i]--;
        nm[i] = i;
    }

    for (int it = 0; it < 500; it++)
        potential();

    cout << ans + 1 << '\n';

    for (int i = 0; i < m; i++)
        cout << mem[i] + 1 << '\n';

    return 0;
}

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