제출 #699495

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
699495		Cross_Ratio	Teoretičar (COCI18_teoreticar)	C++14	0 / 130	327 ms	228548 KiB

teoreticar

#include <bits/stdc++.h>
using namespace std;
int num[500005];
array<int, 2> Edge[100005];
vector<int> adj[100005];
vector<int> adj2[100005];
int num_cnt = 0;
int num1[100005];
int num2[100005];
bool pos[10005][10005];
signed main() {
    cin.sync_with_stdio(false);
    cin.tie(0);
    cout.tie(0);
    int L, R, M;
    cin >> L >> R >> M;
    int i, j;
    for(i=0;i<M;i++) {
        int a, b;
        cin >> a >> b;
        adj[a-1].push_back(b-1);
        adj2[b-1].push_back(a-1);
        Edge[i] = {a-1, b-1};
    }
    for(i=0;i<=L;i++) {
        for(j=0;j<=10000;j++) pos[i][j] = true;
    }
    for(i=0;i<L;i++) {
        int cnt = 0;
        while(!pos[i][cnt]) cnt++;
        pos[i][cnt] = 0;
        num1[i] = cnt;
        for(int j : adj[i]) {
            for(int k : adj2[j]) pos[k][cnt] = false;
        }
    }
    for(i=0;i<=R;i++) {
        for(j=0;j<=10000;j++) pos[i][j] = true;
    }
    for(j=0;j<R;j++) {
        int cnt = 0;
        while(!pos[j][cnt]) cnt++;
        pos[j][cnt] = true;
        num2[j] = cnt;
        for(int i : adj2[j]) {
            for(int k : adj[i]) pos[k][cnt] = false;
        }
    }








    vector<int> idx;
    for(i=0;i<M;i++) {
        idx.push_back(num1[Edge[i][0]]^num2[Edge[i][1]]);
        num[i] = num1[Edge[i][0]]^num2[Edge[i][1]];
    }
    sort(idx.begin(),idx.end());
    idx.erase(unique(idx.begin(),idx.end()),idx.end());
    for(i=0;i<M;i++) {
        num[i] = lower_bound(idx.begin(),idx.end(),num[i]) - idx.begin();
    }
    cout << idx.size() << '\n';
    for(i=0;i<M;i++) cout << num[i]+1 << '\n';
}

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