Submission #1156620

#	Time	Username	Problem	Language	Result	Execution time	Memory
1156620		guagua0407	Ski 2 (JOI24_ski2)	C++20	5 / 100	0 ms	328 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;

int main() {_
    int n,k;
    cin>>n>>k;
    vector<int> c(n),h(n);
    for(int i=0;i<n;i++){
        cin>>h[i]>>c[i];
    }
    vector<pair<int,int>> vec;
    for(int i=0;i<n;i++){
        vec.push_back({h[i],c[i]});
    }
    sort(all(vec));
    int l=0;
    ll mn=inf;
    ll ans=0;
    for(int r=1;r<n;r++){
        if(vec[r].f==vec[0].f){
            vec[r].f++;
            ans+=k;
        }
        if(l<r and vec[l].f<vec[r].f){
            mn=min(mn,(ll)vec[l].s);
            l++;
        }
        else{
            ans+=mn;
        }
    }
    cout<<ans<<'\n';
    return 0;
}
//maybe its multiset not set
//yeeorz
//diaoborz
// dp(i-1,j,k)->dp(i,j+a,max(a,k))

Compilation message (stderr)

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