Submission #699497

#	Time	Username	Problem	Language	Result	Execution time	Memory
699497		Cross_Ratio	Teoretičar (COCI18_teoreticar)	C++14	0 / 130	292 ms	228316 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] = false;
        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] = false;
        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();
    }
    int madeg = 0;
    for(i=0;i<L;i++) madeg = max(madeg, (int)adj[i].size());
    for(i=0;i<R;i++) madeg = max(madeg, (int)adj2[i].size());
    int val = 1;
    for(;val<madeg;val*=2) {}
    assert(idx.size()<=2*val);


    cout << idx.size() << '\n';
    for(i=0;i<M;i++) cout << num[i]+1 << '\n';
}

Compilation message (stderr)

In file included from /usr/include/c++/10/cassert:44,
                 from /usr/include/x86_64-linux-gnu/c++/10/bits/stdc++.h:33,
                 from teoreticar.cpp:1:
teoreticar.cpp: In function 'int main()':
teoreticar.cpp:72:22: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   72 |     assert(idx.size()<=2*val);
      |            ~~~~~~~~~~^~~~~~~

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