제출 #1309833

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1309833		Rares	Radio Towers (IOI22_towers)	C++20	컴파일 에러	0 ms	0 KiB

towers

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

typedef long long ll;
const int MAXN=3e5+10;
const ll INF=LLONG_MAX;

int n,m;
vector <int> pos[MAXN];
vector <pair <ll,ll>> c[MAXN];

ll query (ll i, ll j){
    return (upper_bound (c[i].begin (), c[i].end (), make_pair (j,INF))-1)->second;
}
vector <ll> dpi,dpd;

ll max_weights(int N, int M, vector <int> x, vector <int> y, vector <int> w){
    n=N,m=M;

    for (int i=0;i<m;++i){
        x[i]++;
        y[i]++;
        c[x[i]].push_back ({y[i],w[i]});
    }

    for (int i=0;i<=n+1;++i){
        c[i].push_back ({0,0});
        sort (c[i].begin (),c[i].end ());
        for (int j=1;j<c[i].size ();++j){
            c[i][j].second+=c[i][j-1].second;
        }
    }

    for (int i=1;i<=n;++i){
        vector <int> aux;
        for (auto x:c[i-1]) aux.push_back (x.first);
        for (auto x:c[i+1]) aux.push_back (x.first);
        sort (aux.begin (),aux.end ());
        for (int j=0;j<aux.size ();++j){
            if (j==0 or aux[j]!=aux[j-1]) pos[i].push_back (aux[j]);
        }
    }
    pos[0].push_back (0);
    pos[n+1].push_back (0);

    dpi.resize (1,0);
    dpd.resize (1,0);

    for (int i=1;i<=n+1;++i){
        vector <ll> ndpi(pos[i].size (),0);
        ll pmax=0,k=0;
        for (int j=0;j<pos[i].size ();++j){
            while (k<pos[i-1].size () and pos[i-1][k]<=pos[i][j]){
                pmax=max (pmax, dpi[k]-query (i-1,pos[i-1][k]));
                k++;
            }
            ndpi[j]=max (pmax+query (i-1,pos[i][j]),dpd[0]);
        }

        vector <ll> ndpd (pos[i].size (),0);
        ll smax=0;
        k=pos[i-1].size ()-1;
        for (int j=pos[i].size ()-1;j>=0;--j){
            while (k>=0 and pos[i-1][k]>=pos[i][j]){
                smax=max (smax, max (dpi[k],dpd[k])+query (i,pos[i-1][k]));
                k--;
            }
            ndpd[j]=smax-query (i,pos[i][j]);
        }
        swap (dpi,ndpi);
        swap (dpd,ndpd);
    }

    return max (dpi[0],dpd[0]);
}

컴파일 시 표준 에러 (stderr) 메시지

/usr/bin/ld: /tmp/cc8eiwdt.o: in function `main':
stub.cpp:(.text.startup+0x151): undefined reference to `init(int, std::vector<int, std::allocator<int> >)'
/usr/bin/ld: stub.cpp:(.text.startup+0x1a1): undefined reference to `max_towers(int, int, int)'
collect2: error: ld returned 1 exit status