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답안 #901540

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
901540 2024-01-09T14:15:08 Z GrindMachine Graph (BOI20_graph) C++17
0 / 100
 3 ms 5804 KB 
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>

using namespace std;
using namespace __gnu_pbds;

template<typename T> using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
typedef long long int ll;
typedef long double ld;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define pb push_back
#define endl '\n'
#define sz(a) (int)a.size()
#define setbits(x) __builtin_popcountll(x)
#define ff first
#define ss second
#define conts continue
#define ceil2(x,y) ((x+y-1)/(y))
#define all(a) a.begin(), a.end()
#define rall(a) a.rbegin(), a.rend()
#define yes cout << "YES" << endl
#define no cout << "NO" << endl

#define rep(i,n) for(int i = 0; i < n; ++i)
#define rep1(i,n) for(int i = 1; i <= n; ++i)
#define rev(i,s,e) for(int i = s; i >= e; --i)
#define trav(i,a) for(auto &i : a)

template<typename T>
void amin(T &a, T b) {
    a = min(a,b);
}

template<typename T>
void amax(T &a, T b) {
    a = max(a,b);
}

#ifdef LOCAL
#include "debug.h"
#else
#define debug(x) 42
#endif

/*



*/

const int MOD = 1e9 + 7;
const int N = 1e5 + 5;
const int inf1 = int(1e9) + 5;
const ll inf2 = ll(1e18) + 5;

vector<pll> adj[N];
vector<bool> vis(N);
vector<pll> val(N);
vector<ll> curr_nodes;
pll fix = {-1,-1};
bool ok = true;

void dfs1(ll u){
    if(fix.ff != -1) return;

    curr_nodes.pb(u);
    vis[u] = 1;

    for(auto [v,w] : adj[u]){
        if(fix.ff != -1) return;
        pll want = {-val[u].ff,w-val[u].ss};
        if(vis[v]){
            if(want != val[v]){
                if(want.ff == val[v].ff){
                    ok = false;
                }
                else{
                    auto p1 = want, p2 = val[v];
                    if(p1.ff != 1) swap(p1,p2);
                    ll x = p2.ss-p1.ss;
                    fix = {v,x};
                    return;
                }
            }
        }
        else{
            val[v] = want;
            dfs1(v);
        }
    }
}

vector<ld> ans(N);

void dfs2(ll u){
    vis[u] = 1;
    for(auto [v,w] : adj[u]){
        ld want = w-ans[u];
        if(vis[v]){
            if(ans[v] != want){
                ok = false;
            }
        }
        else{
            ans[v] = want;
            dfs2(v);
        }
    }
}

void solve(int test_case)
{
    ll n,m; cin >> n >> m;
    rep1(i,m){
        ll u,v,w; cin >> u >> v >> w;
        adj[u].pb({v,w}), adj[v].pb({u,w});
    }

    rep1(i,n){
        if(vis[i]) conts;
        curr_nodes.clear();
        fix = {-1,-1};
        val[i] = {1,0};
        dfs1(i);

        if(fix.ff != -1){
            trav(u,curr_nodes){
                vis[u] = 0;
            }
            curr_nodes.clear();
            ans[fix.ff] = (ld)fix.ss/2;
            dfs2(fix.ff);
            conts;
        }

        vector<pll> vals;
        trav(u,curr_nodes){
            vis[u] = 0;
            vals.pb(val[u]);
        }

        pll best = {inf2,inf2};

        for(int x = -2*n; x <= 2*n; ++x){
            // ll x = -k2/k1;
            ll sum = 0;
            for(auto [k3,k4] : vals){
                sum += abs(k3*x+k4);
            }

            pll px = {sum,x};
            amin(best,px);
        }

        ans[i] = best.ss;
        dfs2(i);
    }

    if(!ok){
        no;
        return;
    }

    yes;
    rep1(i,n) cout << ans[i] << " ";
    cout << endl;    
}

int main()
{
    fastio;

    int t = 1;
    // cin >> t;

    rep1(i, t) {
        solve(i);
    }

    return 0;
}

Subtask #1
0 / 5.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5724 KB answer = YES
2 Correct 2 ms 5720 KB answer = YES
3 Correct 2 ms 5724 KB answer = YES
4 Correct 3 ms 5724 KB answer = NO
5 Correct 2 ms 5736 KB answer = YES
6 Correct 2 ms 5724 KB answer = YES
7 Correct 2 ms 5724 KB answer = YES
8 Correct 2 ms 5724 KB answer = YES
9 Correct 2 ms 5724 KB answer = NO
10 Correct 2 ms 5804 KB answer = YES
11 Incorrect 2 ms 5724 KB jury has the better answer: jans = YES, pans = NO
12 Halted 0 ms 0 KB -

Subtask #2
0 / 12.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5724 KB answer = YES
2 Correct 2 ms 5720 KB answer = YES
3 Correct 2 ms 5724 KB answer = YES
4 Correct 3 ms 5724 KB answer = NO
5 Correct 2 ms 5736 KB answer = YES
6 Correct 2 ms 5724 KB answer = YES
7 Correct 2 ms 5724 KB answer = YES
8 Correct 2 ms 5724 KB answer = YES
9 Correct 2 ms 5724 KB answer = NO
10 Correct 2 ms 5804 KB answer = YES
11 Incorrect 2 ms 5724 KB jury has the better answer: jans = YES, pans = NO
12 Halted 0 ms 0 KB -

Subtask #3
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5724 KB answer = YES
2 Correct 2 ms 5720 KB answer = YES
3 Correct 2 ms 5724 KB answer = YES
4 Correct 3 ms 5724 KB answer = NO
5 Correct 2 ms 5736 KB answer = YES
6 Correct 2 ms 5724 KB answer = YES
7 Correct 2 ms 5724 KB answer = YES
8 Correct 2 ms 5724 KB answer = YES
9 Correct 2 ms 5724 KB answer = NO
10 Correct 2 ms 5804 KB answer = YES
11 Incorrect 2 ms 5724 KB jury has the better answer: jans = YES, pans = NO
12 Halted 0 ms 0 KB -

Subtask #4
0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5724 KB answer = YES
2 Correct 2 ms 5720 KB answer = YES
3 Correct 2 ms 5724 KB answer = YES
4 Correct 3 ms 5724 KB answer = NO
5 Correct 2 ms 5736 KB answer = YES
6 Correct 2 ms 5724 KB answer = YES
7 Correct 2 ms 5724 KB answer = YES
8 Correct 2 ms 5724 KB answer = YES
9 Correct 2 ms 5724 KB answer = NO
10 Correct 2 ms 5804 KB answer = YES
11 Incorrect 2 ms 5724 KB jury has the better answer: jans = YES, pans = NO
12 Halted 0 ms 0 KB -

Subtask #5
0 / 42.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 5724 KB answer = YES
2 Correct 2 ms 5720 KB answer = YES
3 Correct 2 ms 5724 KB answer = YES
4 Correct 3 ms 5724 KB answer = NO
5 Correct 2 ms 5736 KB answer = YES
6 Correct 2 ms 5724 KB answer = YES
7 Correct 2 ms 5724 KB answer = YES
8 Correct 2 ms 5724 KB answer = YES
9 Correct 2 ms 5724 KB answer = NO
10 Correct 2 ms 5804 KB answer = YES
11 Incorrect 2 ms 5724 KB jury has the better answer: jans = YES, pans = NO
12 Halted 0 ms 0 KB -