제출 #1098942

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1098942		razivo	Stranded Far From Home (BOI22_island)	C++14	0 / 100	1 ms	348 KiB

island

#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
    long long find(long long p, vector<long long> &dsu) {
        if(p==dsu[p]) return p;
        long long u = find(dsu[p],dsu);
        dsu[p]=u;
        return u;
    }
void un(long long a,long long b,vector<long long> &dsu,vector<long long> &ev) {
        a=find(a,dsu);
        b=find(b,dsu);
        dsu[b]=a;
        ev[a]+=ev[b];
    }
int main()
{
    long long n,m;
    cin>>n>>m;
        vector<long long> v(n),ev(n),dsu(n);
        vector<pair<long long,long long>> s;
    for (long long i = 0; i < n; ++i) {
        long long x; cin>>x;
        ev[i]=x;
        v[i]=x;
        s.push_back({x,i});
        dsu[i]=i;
    }
        sort(s.begin(), s.end());
        vector<vector<int>> g(n);
    vector<pair<pair<long long,long long>,pair<long long,long long>>> ed;
    for (long long i = 0; i < m; ++i) {
        long long x,y; cin>>x>>y; x--; y--;
        if(v[x]>v[y]) swap(x,y);
        g[x].push_back(y);
        g[y].push_back(x);
        ed.push_back({{v[x],v[y]},{x,y}});
    }
    for (int i = 0; i < n; ++i) {
        sort(g[i].begin(),g[i].end(),[v](int a,int b){return v[b]>v[a];});
        for (int j = 0; j < g[i].size()-1; ++j) {
            if(v[g[i][j]]>=v[i])ed.push_back({{v[g[i][j]],v[g[i][j+1]]},{g[i][j],g[i][j+1]}});
        }
    }
        sort(ed.begin(),ed.end());
    for (auto [u,t]:ed) {
        auto [a,b] = t;
            if(ev[find(a,dsu)]>=v[b]) un(a,b,dsu,ev);
    }
        long long ma = find(s[n-1].second,dsu);
    for (long long i = 0; i < n; ++i) {
        if(ma==find(i,dsu))cout<<"1";
        else cout<<"0";
    }
}

컴파일 시 표준 에러 (stderr) 메시지

island.cpp: In function 'int main()':
island.cpp:42:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |         for (int j = 0; j < g[i].size()-1; ++j) {
      |                         ~~^~~~~~~~~~~~~~~
island.cpp:47:15: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   47 |     for (auto [u,t]:ed) {
      |               ^
island.cpp:48:14: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
   48 |         auto [a,b] = t;
      |              ^

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 30
• Subtask 5: 0 / 35