제출 #777572

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
777572		alexander707070	수천개의 섬 (IOI22_islands)	C++17	컴파일 에러	0 ms	0 KiB

islands

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

int n,m;
vector< pair<int,int> > v[MAXN];
vector<int> path,sol;
int ind[MAXN];

void euler(int x,int e){

    for(int i=ind[x];i<v[x].size();i++){
        ind[x]++;
        euler(v[x][i].first,v[x][i].second);

        i=max(i,ind[x]-1);
    }

    path.push_back(e);
}

variant<bool, vector<int> > find_journey(int N, int M, vector<int> U, vector<int> V){
    n=N; m=M;
    for(int i=0;i<m;i++){
        U[i]++; V[i]++;
        v[U[i]].push_back({V[i],i});
    }

    euler(1,1,0,-1);

    path.pop_back();
    reverse(path.begin(),path.end());

    if(path.size()!=m)cout<<1/0;

    for(int i=0;i<m;i++){
        sol.push_back(path[i]);
    }
    for(int i=m-1;i>=0;i--){
        sol.push_back(path[i]);
    }
    
    if(sol.empty())return false;
    return sol;
}

/*
int main(){
    find_journey(6, 7, {0,1,2,2,3,4,5}, {1,2,3,5,4,2,0});
}
*/

컴파일 시 표준 에러 (stderr) 메시지

islands.cpp: In function 'void euler(int, int)':
islands.cpp:13:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   13 |     for(int i=ind[x];i<v[x].size();i++){
      |                      ~^~~~~~~~~~~~
islands.cpp: In function 'std::variant<bool, std::vector<int, std::allocator<int> > > find_journey(int, int, std::vector<int>, std::vector<int>)':
islands.cpp:30:19: error: too many arguments to function 'void euler(int, int)'
   30 |     euler(1,1,0,-1);
      |                   ^
islands.cpp:11:6: note: declared here
   11 | void euler(int x,int e){
      |      ^~~~~
islands.cpp:35:19: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   35 |     if(path.size()!=m)cout<<1/0;
      |        ~~~~~~~~~~~^~~
islands.cpp:35:30: warning: division by zero [-Wdiv-by-zero]
   35 |     if(path.size()!=m)cout<<1/0;
      |                             ~^~