제출 #760566

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
760566		alexander707070	Split the Attractions (IOI19_split)	C++14	0 / 100	408 ms	1048576 KiB

split

#include<bits/stdc++.h>
#define MAXN 200007
using namespace std;

int n,sz[MAXN],br,a,b,c;
vector<int> v[MAXN],ans;
bool ok;
char comp[MAXN],s;

void mark(int x,int p, char d){
    if(br==0)return;

    comp[x]=d; br--;
    for(int i=0;i<v[x].size();i++){
        if(v[x][i]==p)continue;
        mark(v[x][i],x,d);
    }
}

void dfs(int x,int p){
    sz[x]=1;
    for(int i=0;i<v[x].size();i++){
        if(v[x][i]==p)continue;
        dfs(v[x][i],x);
        sz[x]+=sz[v[x][i]];
    }
    
    if(sz[x]>=a and n-sz[x]<=max(b,c) and ok){
        br=a; mark(x,p,'a'); ok=false;

        if(n-sz[x]<=b){br=b; mark(p,x,'b'); s='c';}
        else {br=c; mark(p,x,'c'); s='b';}

    }else if(sz[x]>=b and n-sz[x]<=max(a,c) and ok){
        br=b; mark(x,p,'b'); ok=false;

        if(n-sz[x]<=a){br=a; mark(p,x,'a'); s='c';}
        else {br=c; mark(p,x,'c'); s='a';}
    }else if(sz[x]>=c and n-sz[x]<=max(a,b) and ok){
        br=c; mark(x,p,'c'); ok=false;

        if(n-sz[x]<=b){br=b; mark(p,x,'b'); s='a';}
        else {br=a; mark(p,x,'a'); s='b';}
    }
}

vector<int> find_split(int N, int A, int B, int C,vector<int> p,vector<int> q){
    n=N; a=A; b=B; c=C;
    for(int i=0;i<n-1;i++){
        p[i]++; q[i]++;
        v[p[i]].push_back(q[i]);
        v[q[i]].push_back(p[i]);
    }

    ok=true;
    dfs(1,0);
    ans.resize(n);

    if(ok)return ans;

    for(int i=1;i<=n;i++){
        if(comp[i]<'a' or comp[i]>'c')comp[i]=s;
        ans[i-1]=comp[i]-'a'+1;
    }

    return ans;
}

/*
int main(){
    find_split(9, 4, 2, 3, {0, 0, 0, 0, 0, 0, 1, 3, 4, 5}, {1, 2, 3, 4, 6, 8, 7, 7, 5, 6});
    for(int i=0;i<ans.size();i++){
        cout<<ans[i]<<" ";
    }
}
*/

 

컴파일 시 표준 에러 (stderr) 메시지

split.cpp: In function 'void mark(int, int, char)':
split.cpp:14:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |     for(int i=0;i<v[x].size();i++){
      |                 ~^~~~~~~~~~~~
split.cpp: In function 'void dfs(int, int)':
split.cpp:22:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |     for(int i=0;i<v[x].size();i++){
      |                 ~^~~~~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 22
• Subtask 4: 0 / 24
• Subtask 5: 0 / 36