Submission #1010974

#	Time	Username	Problem	Language	Result	Execution time	Memory
1010974		imarn	JOI tour (JOI24_joitour)	C++17	0 / 100	26 ms	54104 KiB

joitour

#include<bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC target("avx2")
#define ll long long
#define pii pair<int,int>
#define pll pair<ll,ll>
#define plx pair<ll,int>
#define f first
#define s second
#define pb push_back
#define all(x) x.begin(),x.end()
#define vi vector<int>
#define vl vector<ll>
#define vvi vector<vi>
using namespace std;
const int mxn=2e5+5;
vector<int>g[mxn],f;
int sz[mxn]{0};
bool vis[mxn]{0};
ll ans=0;
int getsz(int u,int p){
    sz[u]=1;
    for(auto v:g[u])if(v!=p&&!vis[v])sz[u]+=getsz(v,u);
    return sz[u];
}
int getct(int u,int p,int r){
    for(auto v:g[u])if(v!=p&&!vis[v]&&sz[v]*2>r)return getct(v,u,r);
    return u;
}
vector<ll>dp[10][mxn];
ll td[10][mxn]{0};
ll szs[mxn][3]{0};
void gen1(int u,int p,int x,int id){
    dp[f[u]][x][id]++;
    if(f[u]==2)dp[3][x][id]+=dp[1][x][id];
    if(f[u]==1)dp[4][x][id]+=dp[0][x][id];
    for(auto v:g[u])if(v!=p&&!vis[v])gen1(v,u,x,id);
    dp[f[u]][x][id]--;
}
void gen2(int u,int p,int x,int id){
    for(int i=0;i<3;i++)szs[u][i]=0;szs[u][f[u]]=1;
    for(auto v:g[u]){
        if(v!=p&&!vis[v]){
            gen2(v,u,x,id);
            for(int i=0;i<3;i++)szs[u][i]+=szs[v][i];
        }
    }
    if(f[u]==1)dp[8][x][id]+=szs[u][0];
    if(f[u]==2)dp[9][x][id]+=szs[u][1];
}
void gen3(int u,int p,int x,int id){
    dp[f[u]][x][id]++;
    for(auto v:g[u])if(v!=p&&!vis[v])gen3(v,u,x,id);
}
void play(int u){int id=-1;
    u = getct(u,u,getsz(u,u));vis[u]=1;ans=0;
    for(auto v:g[u]){
        if(vis[v])continue;
        for(int i=0;i<10;i++)dp[i][u].pb(0);id++;
        gen1(v,u,u,id);gen2(v,u,u,id);gen3(v,u,u,id);
        for(int i=0;i<10;i++)td[i][u]+=dp[i][u][id];
    }
    for(int j=0;j<=id;j++){
        ans+=dp[0][u][j]*(td[3][u]-dp[3][u][j]);
        ans+=dp[8][u][j]*(td[2][u]-dp[2][u][j]);
        if(f[u]==1)ans+=dp[0][u][j]*(td[2][u]-dp[2][u][j]);
    }
    if(f[u]==0)ans+=td[3][u];if(f[u]==2)ans+=td[8][u];
    for(auto v:g[u])if(!vis[v])play(v);
}
void init(int N, std::vector<int> F, std::vector<int> U, std::vector<int> V,int Q){
    f=F;for(int i=0;i<N-1;i++)g[U[i]].pb(V[i]),g[V[i]].pb(U[i]);
    play(0);
}

void change(int X, int Y) {}

long long num_tours() {
  return ans;
}

Compilation message (stderr)

joitour.cpp: In function 'void gen2(int, int, int, int)':
joitour.cpp:41:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   41 |     for(int i=0;i<3;i++)szs[u][i]=0;szs[u][f[u]]=1;
      |     ^~~
joitour.cpp:41:37: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   41 |     for(int i=0;i<3;i++)szs[u][i]=0;szs[u][f[u]]=1;
      |                                     ^~~
joitour.cpp: In function 'void play(int)':
joitour.cpp:59:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   59 |         for(int i=0;i<10;i++)dp[i][u].pb(0);id++;
      |         ^~~
joitour.cpp:59:45: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   59 |         for(int i=0;i<10;i++)dp[i][u].pb(0);id++;
      |                                             ^~
joitour.cpp:68:5: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   68 |     if(f[u]==0)ans+=td[3][u];if(f[u]==2)ans+=td[8][u];
      |     ^~
joitour.cpp:68:30: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   68 |     if(f[u]==0)ans+=td[3][u];if(f[u]==2)ans+=td[8][u];
      |                              ^~

• Subtask 1: 0 / 6
• Subtask 2: 0 / 8
• Subtask 3: 0 / 6
• Subtask 4: 0 / 16
• Subtask 5: 0 / 16
• Subtask 6: 0 / 34
• Subtask 7: 0 / 14