Submission #691339

#	Time	Username	Problem	Language	Result	Execution time	Memory
691339		guagua0407	Growing Vegetables is Fun 4 (JOI21_ho_t1)	C++17	100 / 100	43 ms	6952 KiB

Main

/*
燒雞
 燒雞
  燒雞    好想進選訓
 燒雞
燒雞
*/
#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);

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

int main() {_
    //setIO("wayne");
    int n;
    cin>>n;
    int num[n+1];
    for(int i=1;i<=n;i++){
        cin>>num[i];
    }
    int dif[n+1];
    for(int i=2;i<=n;i++){
        dif[i]=num[i]-num[i-1];
    }
    ll pre[n+1],suf[n+1];
    pre[1]=0;
    for(int i=2;i<=n;i++){
        pre[i]=pre[i-1];
        if(dif[i]<=0){
            pre[i]+=-1*dif[i]+1;
        }
    }
    suf[n]=0;
    for(int i=n-1;i>=1;i--){
        suf[i]=suf[i+1];
        if(dif[i+1]>=0){
            suf[i]+=dif[i+1]+1;
        }
    }
    ll ans=1e18;
    for(int i=1;i<=n;i++){
        ans=min(ans,max(pre[i],suf[i]));
    }
    cout<<ans;
    return 0;
}
//maybe its multiset not set

Compilation message (stderr)

Main.cpp: In function 'void setIO(std::string)':
Main.cpp:19:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     freopen((s + ".in").c_str(), "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:20:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     freopen((s + ".out").c_str(), "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 40 / 40
• Subtask 2: 60 / 60