oj.uz

Submission #96288

# Submission time Handle Problem Language Result Execution time Memory
96288 2019-02-07T20:48:57 Z dalgerok Praktični (COCI18_prakticni) C++14
0 / 130
 104 ms 12532 KB 
#include<bits/stdc++.h>
using namespace std;



const int N = 1e5 + 5;




int n, m, d[N], cl[N];
vector < pair < pair < int, int >, int > > g[N];
vector < pair < int, int > > e;

void dfs(int v, int pr = -1){
    cl[v] = 1;
    for(auto it : g[v]){
        int to = it.first.first, len = it.first.second;
        if(to != pr){
            if(!cl[to]){
                d[to] = (d[v] ^ len);
                dfs(to, v);
            }
            else if(cl[to] == 1){
                e.push_back(make_pair((d[v] ^ len ^ d[to]), it.second));
            }
        }
    }
    cl[v] = 2;
}

vector < int > bas;
map < int, vector < int > > ans;
inline void add(int x){
    for(auto it : bas){
        x = min(x, (x ^ it));
    }
    if(!x){
        return;
    }
    for(auto &it : bas){
        it = min(it, (it ^ x));
    }
    bas.push_back(x);
    sort(bas.rbegin(), bas.rend());
}
inline void upd(int x, int y){
    int cur = 0;
    for(auto it : bas){
        if((x ^ it) < x){
            cur ^= it;
            x ^= it;
        }
    }
    ans[cur].push_back(y);
}

int main(){
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
    cin >> n >> m;
    for(int i = 1; i <= m; i++){
        int x, y, z;
        cin >> x >> y >> z;
        g[x].push_back(make_pair(make_pair(y, z), i));
        g[y].push_back(make_pair(make_pair(x, z), i));
    }
    dfs(1);
    for(auto it : e){
        if(it.first){
            add(it.first);
        }
    }
    for(auto it : e){
        if(it.first){
            upd(it.first, it.second);
        }
    }
    cout << (int)ans.size() << "\n";
    for(auto it : ans){
        cout << it.first << " ";
        for(auto x : it.second){
            cout << x << " ";
        }
        cout << "\n";
    }
}

Subtask #1
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 31 ms 6264 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #2
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 15 ms 4344 KB Unexpected end of file - int32 expected
2 Halted 0 ms 0 KB -

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 40 ms 7288 KB Integer 48848 violates the range [1, 48785]
2 Halted 0 ms 0 KB -

Subtask #4
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 68 ms 8824 KB Integer 267576 violates the range [1, 90970]
2 Halted 0 ms 0 KB -

Subtask #5
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 45 ms 7416 KB Integer 84064 violates the range [1, 66382]
2 Halted 0 ms 0 KB -

Subtask #6
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 69 ms 8300 KB Integer 84483 violates the range [1, 73386]
2 Halted 0 ms 0 KB -

Subtask #7
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 82 ms 9248 KB Integer 232999 violates the range [1, 90440]
2 Halted 0 ms 0 KB -

Subtask #8
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 104 ms 12532 KB Integer 103542 violates the range [1, 98970]
2 Halted 0 ms 0 KB -

Subtask #9
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 23 ms 4648 KB Integer 2789814 violates the range [1, 31757]
2 Halted 0 ms 0 KB -

Subtask #10
0 / 13.0

# Verdict Execution time Memory Grader output
1 Incorrect 97 ms 9948 KB Integer 402840 violates the range [1, 96069]
2 Halted 0 ms 0 KB -