제출 #1069449

#제출 시각아이디문제언어결과실행 시간메모리
1069449vjudge1Overtaking (IOI23_overtaking)C++17
100 / 100
2683 ms200692 KiB
#include "overtaking.h"
#include<bits/stdc++.h>
using namespace std;
#pragma GCC optimize(2)
#define GO(l,r) (sped*(dis[r]-dis[l]))
typedef long long ll;
map<ll,ll> station[1010];
#define MP make_pair
vector<ll> dis;
unordered_map<ll,ll>memo[1010];
ll dp[1010][1010],XTH[1010][1010],pos[1010][1010];
ll sped;
ll st[1010][1010];
int M,N2;
inline int onezsmaller(int station,ll T){
    return lower_bound(XTH[station],XTH[station]+N2+1,T)-XTH[station]-1;
}
void init(int L, int N, vector<ll> T, vector<int> W, int X, int M_, vector<int> S){
    for(auto i:S)dis.push_back(i);
    sped=X;
    M=M_;
    for(int i=1;i<=N;i++)
        dp[i][0]=T[i-1];
    int x=clock();
    for(int j=1;j<M;j++) {for(int i=1;i<=N;i++)
        dp[i][j]=dp[i][j-1]+(dis[j]-dis[j-1])*W[i-1];
        vector<int>V(N);
        iota(V.begin(),V.end(),1);
        sort(V.begin(),V.end(),[j](int a,int b){
            return dp[a][j-1]-dp[b][j-1]?dp[a][j-1]<dp[b][j-1]:dp[a][j]<dp[b][j];
        });
        ll prv=0;
        for(auto i:V) {
            prv=dp[i][j]=max(dp[i][j],prv);
            if(W[i-1]>X)
                station[j-1][dp[i][j-1]]=dp[i][j];
        }
    }
    int y=clock();
    for(int i=1;i<=N;i++)
        if(W[i-1]>X) { N2++;
            for(int j=0;j<M;j++)
                st[j][N2]=dp[i][j];
        }
    for(int i=0;i<M;i++)
        st[i][0]=-1,
        sort(st[i],st[i]+N2+1);
    for(int i=0;i<M;i++)
        for(int j=0;j<=N2;j++)
            XTH[i][j]=st[i][j];
    for(int j=0;j<M-1;j++)
        station[j][-1]=0;
    cerr<<(y-x)/1.0/CLOCKS_PER_SEC<<'\n';
}
ll CCCALC(int STA,ll T){
    int ST=STA;
    ll org=T;
    if(memo[ST][T])
        return memo[ST][T];
    int C=onezsmaller(ST,T);
    if(C==onezsmaller(M-1,GO(ST,M-1)+T))
        return GO(ST,M-1)+T;
    int l=ST,r=M-1,res=-1;
    while(l<=r){
        int mid=l+r>>1;
        if(XTH[mid][C]<GO(ST,mid)+T)
            l=mid+1,res=mid;
        else r=mid-1;
    }
    assert(res>=0);
    T+=GO(ST,res);
    ST=res;
    return memo[STA][org]=CCCALC(res+1,(--station[res].lower_bound(T))->second);
}
int ans,CC;
ll arrival_time(ll Y){
    ll res= CCCALC(0,Y);
    return res;
}

컴파일 시 표준 에러 (stderr) 메시지

overtaking.cpp: In function 'void init(int, int, std::vector<long long int>, std::vector<int>, int, int, std::vector<int>)':
overtaking.cpp:25:27: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   25 |     for(int j=1;j<M;j++) {for(int i=1;i<=N;i++)
      |                           ^~~
overtaking.cpp:27:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   27 |         vector<int>V(N);
      |         ^~~~~~
overtaking.cpp: In function 'll CCCALC(int, ll)':
overtaking.cpp:65:18: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   65 |         int mid=l+r>>1;
      |                 ~^~
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