제출 #1123349

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1123349		modwwe	도로 개발 (JOI15_road_development)	C++20	10 / 100	2096 ms	24528 KiB

road_development

#include<bits/stdc++.h>
//#define int  long long
#define ll long long
#define down cout<<'\n';
#define debug cout<<" cucuucucuuu",down
#define NHP     ios_base::sync_with_stdio(0);cout.tie(0);cin.tie(0);
#define modwwe  int t;cin>>t; while(t--)
#define bit(i,j) (i>>j&1)
#define sobit(a) __builtin_popcountll(a)
#define task "test"
#define fin(x) freopen(x".inp","r",stdin)
#define fou(x) freopen(x".ans","w",stdout)
#define pb push_back
#define mask(k) (1<<k)
#define mp make_pair
#define checktime   cerr << (double)clock() / CLOCKS_PER_SEC * 1000  << " ms";
using namespace std;
#define getchar_unlocked getchar

inline int scan()
{
    char c = getchar_unlocked();
    int x = 0;
    while (c < '0' || c > '9')
    {
        c = getchar_unlocked();
    }
    while (c >= '0' && c <= '9')
    {
        x = (x << 1) + (x << 3) + c - '0';
        c = getchar_unlocked();
    }
    return x;
}
void phongbeo();
const int inf = 1e9;
const ll mod2 = 998244353;
const int  mod1 = 998244353;
const ll base=67;
int add(int x,int y)
{
    if(x+y>=mod2) x-=mod2;
    if(x+y<0)x+=mod2;
    return x+y;
}
struct icd
{
    long double a;
    int b;
};
struct ib
{
    int a;
    int b;
};
struct ic
{
    int a, b, c;
};
struct id
{
    int a, b, c, d;
};
struct ie
{
    int a, b, c, d, e;

};
int n, m, s1, s2, s4, s3, sf, k, s5, s6, mx, s7, s8, s9, mx2, res, dem2 = 0, dem = 0, s33, dem3, dem4, mid, l2, r2, center;
int  i, s10, s12,k1,k2,k3,s11,lim,w,l,r ;
int kk;
int el = 19;
main()
{
    if(fopen(task".inp","r"))
    {
        fin(task);
        fou(task);
    }
    NHP
    /// cin>>s1;
    // modwwe
    phongbeo();
    // checktime
}
vector<int> v[100001];
int head[100001];
int heavy[100001];
int in[100001];
int ou[100001];
int st[17][100001];
vector<ic> ask;
struct dsuconcu
{
    ib dsu[100001];
    void reset()
    {
        for(int i=1; i<=n; i++)
            dsu[i]= {1,i};
    }
    int get(int x)
    {
        if(dsu[x].b==x) return x;
        return dsu[x].b=get(dsu[x].b);
    }
    bool noi(int x,int y)
    {
        x=get(x);
        y=get(y);
        if(x==y) return 0;
        if(dsu[x].a<dsu[y].a)swap(x,y);
        dsu[x].a+=dsu[y].a;
        dsu[y].b=x;
        return 1;
    }
} ds;
int dfs(int x,int y)
{
    st[0][x]=y;
    int sz=0,mxz=0;
    for(auto f:v[x])
        if(f^y)
        {
            int s=dfs(f,x);
            sz+=s;
            if(s>mxz)
            {
                mxz=s;
                heavy[x]=f;
            }
        }
    return sz;
}
void des(int x,int y)
{
    head[x]=y;
    in[x]=++dem;
    if(heavy[x]!=0)
        des(heavy[x],y);
    for(auto f:v[x])
        if(!in[f])
            des(f,f);
    ou[x]=dem;
}
struct st
{
    int t[400001];
    void build(int node,int l,int r)
    {
        t[node]=r-l+1;
        if(l==r) return;
        int mid=l+r>>1;
        build(node<<1,l,mid);
        build(node<<1|1,mid+1,r);
    }
    int get(int node,int l,int r,int l1,int r1,bool x)
    {
        if(l>r1||r<l1||t[node]==0) return 0;
        if(l>=l1&&r<=r1)
        {
            int kk=t[node];
            if(x) t[node]=0;
            return kk;
        }
        int mid=l+r>>1;
        int a1=get(node<<1,l,mid,l1,r1,x);
        int b1=get(node<<1|1,mid+1,r,l1,r1,x);
        t[node]=t[node<<1]+t[node<<1|1];
        return a1+b1;
    }
} seg;
int get(int x,int y,bool z)
{
    if(in[x]<=in[y]) return 0;
    if(in[head[x]]<=in[y]+1)return seg.get(1,1,n,in[y]+1,in[x],z);
    return seg.get(1,1,n,in[head[x]],in[x],z)+get(st[0][head[x]],y,z);
}
bool check(int x,int y)
{
    if(in[x]<=in[y]&&in[y]<=ou[x]) return 1;
    return 0;
}
int lca(int x,int y)
{
    if(check(x,y))return x;
    for(int i=16; i>=0; --i)
        if(!check(st[i][x],y))
            x=st[i][x];
    return st[0][x];
}
int solve(int x,int y,bool z)
{
    k=lca(x,y);
    return get(x,k,z)+get(y,k,z);
}
void phongbeo()
{
    cin>>n>>m;
    ds.reset();
    seg.build(1,1,n);
    for(int i=1; i<=m; i++)
    {
        cin>>l>>r>>s2;
        if(l==1)
            if(ds.noi(r,s2))
            {
                v[r].pb(s2);
                v[s2].pb(r);
            }
        ask.pb({l,r,s2});
    }
    ds.reset();
    for(int i=1; i<=n; i++)
        if(st[0][i]==0)
            dfs(i,0);
    for(int i=1; i<=n; i++)
        if(!in[i])
            des(i,i);
    for(int i=1; i<17; i++)
        for(int j=1; j<=n; j++)
            st[i][j]=st[i-1][st[i-1][j]];
    ou[0]=dem;
    for(auto x:ask)
    {
        if(x.a==1)
        {
            if(!ds.noi(x.b,x.c))
            {
                solve(x.b,x.c,1);
            }
        }
        else
        {
            s2=ds.get(x.b);
            s3=ds.get(x.c);
            if(s2!=s3)
            {
                cout<<-1;
            }
            else
            {
                cout<<solve(x.b,x.c,0);
            }
            down
        }
    }
}

컴파일 시 표준 에러 (stderr) 메시지

road_development.cpp:73:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   73 | main()
      | ^~~~
road_development.cpp: In function 'int main()':
road_development.cpp:11:23: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | #define fin(x) freopen(x".inp","r",stdin)
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~
road_development.cpp:77:9: note: in expansion of macro 'fin'
   77 |         fin(task);
      |         ^~~
road_development.cpp:12:23: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 | #define fou(x) freopen(x".ans","w",stdout)
      |                ~~~~~~~^~~~~~~~~~~~~~~~~~~~
road_development.cpp:78:9: note: in expansion of macro 'fou'
   78 |         fou(task);
      |         ^~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 25
• Subtask 3: 0 / 25
• Subtask 4: 0 / 25
• Subtask 5: 0 / 15