Submission #1065142

#	Time	Username	Problem	Language	Result	Execution time	Memory
1065142		vjudge1	봉쇄 시간 (IOI23_closing)	C++17	35 / 100	109 ms	33208 KiB

closing

#include "closing.h"
#include<bits/stdc++.h>
using namespace std;
vector<pair<int,int>>adj[200100];
vector<long long>v;
void dfs(int n,int p,long long d){
    v.push_back(d);
    for(auto[i,w]:adj[n])
        if(i-p)dfs(i,n,d+w);
}
int max_score(int N, int X, int Y, long long K,std::vector<int> U, std::vector<int> V, std::vector<int> W){
    vector<long long>pos(N);
    for(int i=1;i<N;i++)
        pos[i]=pos[i-1]+W[i-1];
    for(int i=0;i<N-1;i++)
        adj[U[i]].push_back({V[i],W[i]}),
        adj[V[i]].push_back({U[i],W[i]});
    v.clear();
    dfs(X,N,0);
    dfs(Y,N,0);
    sort(v.rbegin(),v.rend());
    long long origK=K;
    while(v.size())
        if(v.back()<=K)
            K-=v.back(),
            v.pop_back();
        else break;
    for(int i=0;i<N;i++)
        adj[i].clear();
    K=origK;
    int ans1=2*N-v.size();
    priority_queue<pair<int,int>,vector<pair<int,int>>,greater<>> pq;
    int ans2=0;
    for(int i=X;i<Y;i++){
        int A=pos[i]-pos[X];
        int B=pos[Y]-pos[i];
        K-=min(A,B);ans2++;
        pq.push({max(B,A)-min(A,B),1});
    }
    for(int i=0;i<X;i++)
        pq.push({pos[X]-pos[i],0});
    for(int i=Y;i<N;i++)
        pq.push({pos[i]-pos[Y],0});
    if(K<0)
        ans2=0;
    while(pq.size()){ auto[a,b]=pq.top();
        if(a>K)break;K-=a;pq.pop();ans2++;
        if(!b)pq.push({pos[Y]-pos[X],1});
    }
    return max(ans1,ans2);
}

Compilation message (stderr)

closing.cpp: In function 'int max_score(int, int, int, long long int, std::vector<int>, std::vector<int>, std::vector<int>)':
closing.cpp:47:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation]
   47 |         if(a>K)break;K-=a;pq.pop();ans2++;
      |         ^~
closing.cpp:47:22: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if'
   47 |         if(a>K)break;K-=a;pq.pop();ans2++;
      |                      ^

• Subtask 0: 0 / 0
• Subtask 1: 0 / 8
• Subtask 2: 9 / 9
• Subtask 3: 12 / 12
• Subtask 4: 14 / 14
• Subtask 5: 0 / 9
• Subtask 6: 0 / 11
• Subtask 7: 0 / 10
• Subtask 8: 0 / 10
• Subtask 9: 0 / 17