제출 #1157556

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1157556		guagua0407	Ski 2 (JOI24_ski2)	C++20	86 / 100	195 ms	1948 KiB

Main

//#pragma GCC optimize("O3")
#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pii pair<int,int>
#define f first
#define s second
#define all(x) x.begin(),x.end()
#define _ ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);

int dx[4]={0,0,1,-1};
int dy[4]={1,-1,0,0};

void setIO(string s) {
    freopen((s + ".in").c_str(), "r", stdin);
    freopen((s + ".out").c_str(), "w", stdout);
}

const ll inf=(ll)1e18;
const int mxn=305;
vector<vector<ll>> dp(mxn,vector<ll>(mxn,inf));

int main() {_
    ll n,K;
    cin>>n>>K;
    vector<ll> h(n),c(n);
    for(int i=0;i<n;i++){
        cin>>h[i]>>c[i];
    }
    ll mnh=*min_element(all(h));
    ll mnc=inf;
    for(int i=0;i<n;i++){
        if(h[i]==mnh) mnc=min(mnc,c[i]);
    }
    int pos;
    for(int i=0;i<n;i++){
        if(h[i]==mnh and c[i]==mnc){
            pos=i;
            break;
        }
    }
    ll sum=0;
    for(int i=0;i<n;i++){
        if(h[i]==mnh and i!=pos){
            h[i]++;
            sum+=K;
        }
    }
    vector<int> cnt(2*mxn);
    vector<ll> mn(2*mxn,inf);
    for(int i=0;i<n;i++){
        cnt[h[i]]++;
        mn[h[i]]=min(mn[h[i]],c[i]);
    }
    ll curmn=mn[mnh];
    dp[1][0]=0;
    for(int i=mnh+1;i<2*mxn;i++){
        vector<vector<ll>> dpn(mxn,vector<ll>(mxn,inf));
        for(int j=0;j<=n;j++){
            for(int k=0;k<=n;k++){
                dpn[j][max(0,k+cnt[i]-j)]=min(dpn[j][max(0,k+cnt[i]-j)],dp[j][k]+K*k);
            }
        }
        for(int j=0;j<=n;j++){
            for(int k=0;k<=n;k++){
                if(k>0) dpn[j+1][k-1]=min(dpn[j+1][k-1],dpn[j][k]+curmn);
            }
        }
        swap(dp,dpn);
        curmn=min(curmn,mn[i]);
    }
    ll ans=inf;
    for(int j=0;j<=n;j++){
        ans=min(ans,dp[j][0]);
    }
    cout<<ans+sum<<'\n';
    return 0;
}
//maybe its multiset not set
//yeeorz
//diaoborz
// dp(i,j,k)->dp(i,j+1,k-1)+mn
// dp(i,j,k)->dp(i+1,j,max(0,k+cnt[i+1]-j))+K*k

컴파일 시 표준 에러 (stderr) 메시지

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:15:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   15 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:16:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 12 / 12
• Subtask 3: 9 / 9
• Subtask 4: 33 / 33
• Subtask 5: 27 / 27
• Subtask 6: 0 / 14