Submission #1084499

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
1084499	2024-09-06 10:35:11	_rain_	Discharging (NOI20_discharging)	C++14	100 / 100	78 ms	16124 KiB

Discharging

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#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define fixbug false
const ll INF = (ll)4e18+7;
const int maxn = 1e6;
ll a[maxn+2] ;
int n;
namespace subtask1{
    bool check(){
        return n <= 1500;
    }
    const int N = 1500;
    ll f[N+2] , sum[N+2] = {};
    void main_code(){
        for (int i = 1; i <= n; ++i) f[i] = INF , sum[i] = INF;
        for (int i = 1; i <= n; ++i){
            ll mx = a[i];
            for (int j = i; j >= 1; --j){
                mx = max(mx , a[j]);
                f[i] = min(f[i] , f[j - 1] + mx * (n - j + 1));
            }
        }
        cout << f[n];
        return;
    }
}
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

Discharging.cpp: In function 'long long int subtask2::Find(long long int, int)':
Discharging.cpp:67:23: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   67 |             int m = l + r >> 1;
      |                     ~~^~~
Discharging.cpp: In function 'int main()':
Discharging.cpp:110:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  110 |         freopen(name".inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
Discharging.cpp:111:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
  111 |         freopen(name".out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 9 / 9
• Subtask 2: 13 / 13
• Subtask 3: 25 / 25
• Subtask 4: 11 / 11
• Subtask 5: 14 / 14
• Subtask 6: 28 / 28