oj.uz

Submission #1077577

# Submission time Handle Problem Language Result Execution time Memory
1077577 2024-08-27T08:04:56 Z GrindMachine Swapping Cities (APIO20_swap) C++17
0 / 100
 57 ms 14084 KB 
#include <bits/stdc++.h>
using namespace std;

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 conts continue
#define sz(a) (int)a.size()
#define all(a) a.begin(),a.end()
#define rall(a) a.rbegin(),a.rend()
#define ff first
#define ss second

#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 &x, T y){
    x = min(x,y);
}

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

template<typename A,typename B>
string to_string(pair<A,B> p);

string to_string(const string &s){
    return "'"+s+"'";
}

string to_string(const char* s){
    return to_string((string)s);
}

string to_string(bool b){
    return b?"true":"false";
}

string to_string(vector<bool> v){
    string res = "{";
    rep(i,sz(v)){
        res += to_string(v[i])+",";
    }
    if(res.back() == ',') res.pop_back();
    res += "}";
    return res;
}

template<typename A>
string to_string(A v){
    string res = "{";
    trav(x,v){
        res += to_string(x)+",";
    }
    if(res.back() == ',') res.pop_back();
    res += "}";
    return res;
}

template<typename A,typename B>
string to_string(pair<A,B> p){
    return "("+to_string(p.ff)+","+to_string(p.ss)+")";
}

#define debug(x) cout << "[" << #x << "]: "; cout << to_string(x) << endl

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

#include "swap.h"

vector<int> par(N);

int find(int u){
    if(u == par[u]) return u;
    return par[u] = find(par[u]);
}

void merge(int u, int v){
    u = find(u), v = find(v);
    if(u == v) return;
    par[v] = u;
}

vector<pii> adj1[N], adj2[N];
vector<int> pedge(N,inf1);

void dfs1(int u, int p){
    for(auto [v,w] : adj1[u]){
        if(v == p) conts;
        pedge[v] = w;
        pii px = {u,w};
        adj1[v].erase(find(all(adj1[v]),px));
        dfs1(v,u);
    }
}

int fmn(int u, pii ignore){
    int mn = inf1;
    for(auto [v,w] : adj2[u]){
        if(v == ignore.ff or v == ignore.ss) conts;
        amin(mn,w);
    }
    return mn;
}

const int LOG = 17;

int up[N][LOG], mnw[N][LOG], mxw[N][LOG];
vector<int> depth(N);

void dfs2(int u){
    for(auto [v,w] : adj1[u]){
        depth[v] = depth[u]+1;
        up[v][0] = u;
        mnw[v][0] = fmn(u,{v,-1});
        mxw[v][0] = w;
        rep1(j,LOG-1){
            up[v][j] = up[up[v][j-1]][j-1];
            mnw[v][j] = min(mnw[v][j-1],mnw[up[v][j-1]][j-1]);
            mxw[v][j] = max(mxw[v][j-1],mxw[up[v][j-1]][j-1]);
        }

        dfs2(v);
    }
}

int lift(int u, int k){
    rep(j,LOG){
        if(k&(1<<j)){
            u = up[u][j];
        }
    }
    return u;
}

int get_lca(int u, int v){
    if(depth[u] < depth[v]) swap(u,v);
    int k = depth[u]-depth[v];
    u = lift(u,k);
    if(u == v) return u;

    rev(j,LOG-1,0){
        if(up[u][j] != up[v][j]){
            u = up[u][j];
            v = up[v][j];
        }
    }

    u = up[u][0], v = up[v][0];
    assert(u == v);
    return u;
}

int get_mn(int u, int k){
    if(k < 0) return inf1;
    int mn = inf1;
    rep(j,LOG){
        if(k&(1<<j)){
            amin(mn,mnw[u][j]);
            u = up[u][j];
        }
    }
    return mn;
}

int get_mx(int u, int k){
    int mx = -inf1;
    rep(j,LOG){
        if(k&(1<<j)){
            amax(mx,mxw[u][j]);
            u = up[u][j];
        }
    }
    return mx;
}

void init(int n, int m,
          std::vector<int> U, std::vector<int> V, std::vector<int> W) {

    return;

    vector<array<int,3>> edges;
    rep(i,m){
        edges.pb({W[i],U[i],V[i]});
    }

    sort(all(edges));
    vector<array<int,3>> span, non_span;
    iota(all(par),0);

    for(auto [w,u,v] : edges){
        if(find(u) != find(v)){
            span.pb({u,v,w});
            merge(u,v);
        }
        else{
            non_span.pb({u,v,w});
        }
    }

    for(auto [u,v,w] : span){
        adj1[u].pb({v,w}), adj1[v].pb({u,w});
    }

    for(auto [u,v,w] : non_span){
        adj2[u].pb({v,w}), adj2[v].pb({u,w});
    }

    dfs1(0,-1);

    rep(u,n){
        for(auto [v,w] : adj1[u]){
            adj2[u].pb({v,w});
        }

        sort(all(adj1[u]));
        sort(all(adj2[u]));
    }   

    rep(j,LOG) mnw[0][j] = inf1;
    dfs2(0);
}

int getMinimumFuelCapacity(int u, int v) {
    assert(u != v);
    return -1;

    if(depth[u] > depth[v]) swap(u,v);
    int lca = get_lca(u,v);

    int du = depth[u]-depth[lca];
    int dv = depth[v]-depth[lca];
    int pmx = max(get_mx(u,du),get_mx(v,dv));

    int mn = inf1;
    amin(mn,get_mn(u,du-1));
    amin(mn,get_mn(v,dv-1));

    if(u == lca){
        // int jb = lift(v,dv-1);
        // amin(mn,fmn(u,{jb,-1}));
    }
    else{
        amin(mn,fmn(u,{-1,-1}));
        int jbu = lift(u,du-1), jbv = lift(v,dv-1);
        amin(mn,fmn(lca,{jbu,jbv}));
        amin(mn,pedge[lca]);
    }

    amin(mn,fmn(v,{-1,-1}));

    int ans = max(pmx,mn);
    if(ans == inf1) ans = -1;

    return ans;
}

Subtask #1
0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6236 KB Output is correct
2 Correct 3 ms 6492 KB Output is correct
3 Correct 3 ms 6336 KB Output is correct
4 Correct 3 ms 6332 KB Output is correct
5 Correct 3 ms 6236 KB Output is correct
6 Correct 3 ms 6344 KB Output is correct
7 Correct 3 ms 6236 KB Output is correct
8 Correct 3 ms 6172 KB Output is correct
9 Correct 17 ms 9820 KB Output is correct
10 Correct 21 ms 10320 KB Output is correct
11 Correct 21 ms 10064 KB Output is correct
12 Correct 24 ms 10432 KB Output is correct
13 Correct 30 ms 10324 KB Output is correct
14 Correct 26 ms 9808 KB Output is correct
15 Correct 55 ms 14044 KB Output is correct
16 Correct 55 ms 14084 KB Output is correct
17 Correct 57 ms 13992 KB Output is correct
18 Correct 54 ms 13868 KB Output is correct
19 Incorrect 34 ms 10524 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #2
0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6236 KB Output is correct
2 Correct 3 ms 6492 KB Output is correct
3 Incorrect 53 ms 13560 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6236 KB Output is correct
2 Correct 3 ms 6492 KB Output is correct
3 Correct 3 ms 6336 KB Output is correct
4 Correct 3 ms 6332 KB Output is correct
5 Correct 3 ms 6236 KB Output is correct
6 Correct 3 ms 6344 KB Output is correct
7 Correct 3 ms 6236 KB Output is correct
8 Correct 3 ms 6172 KB Output is correct
9 Incorrect 3 ms 6236 KB Output isn't correct
10 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 6236 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 6236 KB Output is correct
2 Correct 3 ms 6492 KB Output is correct
3 Correct 3 ms 6336 KB Output is correct
4 Correct 3 ms 6332 KB Output is correct
5 Correct 3 ms 6236 KB Output is correct
6 Correct 3 ms 6344 KB Output is correct
7 Correct 3 ms 6236 KB Output is correct
8 Correct 3 ms 6172 KB Output is correct
9 Correct 17 ms 9820 KB Output is correct
10 Correct 21 ms 10320 KB Output is correct
11 Correct 21 ms 10064 KB Output is correct
12 Correct 24 ms 10432 KB Output is correct
13 Correct 30 ms 10324 KB Output is correct
14 Correct 26 ms 9808 KB Output is correct
15 Correct 55 ms 14044 KB Output is correct
16 Correct 55 ms 14084 KB Output is correct
17 Correct 57 ms 13992 KB Output is correct
18 Correct 54 ms 13868 KB Output is correct
19 Incorrect 53 ms 13560 KB Output isn't correct
20 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Incorrect 3 ms 6236 KB Output isn't correct
2 Halted 0 ms 0 KB -