Submission #525142

#	Time	Username	Problem	Language	Result	Execution time	Memory
525142		TheKingAleks	Skyline (IZhO11_skyline)	C++14	0 / 100	2080 ms	460 KiB

skyline

#include<bits/stdc++.h>
#define endl '\n'
using namespace std;
const int MAX_N = 302;
const int MAX_H = 202;
const int INF = 1e9+7;
int n,dp[MAX_N][MAX_H],a[MAX_N];
int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    cout.tie(NULL);
    cin>>n;
    for(int i=0; i<=MAX_N; i++)
    {
        for(int j=0; j<=MAX_H; j++)
        {
            dp[i][j] = INF;
        }
    }
    for(int i=1; i<=n; i++) cin>>a[i];
    for(int j=0; j<=a[1]; j++)
    {
        dp[1][j] = (a[1]-j)*3;
    }
    if(n == 1)
    {
        cout<<dp[n][0]<<endl;
        return 0;
    }
    for(int x=0; x<=a[2]; x++)
    {
        int mini = min(a[2]-x,a[1]);
        dp[2][x] = (mini*5+(a[1]-mini)*3+(a[2]-x-mini)*3);
    }
    if(n == 2)
    {
        cout<<dp[n][0]<<endl;
        return 0;
    }
    for(int i=3; i<=n; i++)
    {
        for(int x=0; x<=a[i]; x++)
        {
            int tmp = 0;
            int last_val = min({a[i-2],a[i-1],a[i]-x});
            for(int j=0; j<=last_val; j++)
            {
                tmp = dp[i-2][j]+j*7;
                int mini = min(a[i]-x-j,a[i-1]-j);
                tmp += mini*5;
                tmp += (a[i-1]-j-mini)*3+(a[i]-x-j-mini)*3;
                dp[i][x] = min(dp[i][x],tmp);
                tmp = 0;
            }
        }
    }
    cout<<dp[n][0]<<endl;
}

Compilation message (stderr)

skyline.cpp: In function 'int main()':
skyline.cpp:18:22: warning: iteration 202 invokes undefined behavior [-Waggressive-loop-optimizations]
   18 |             dp[i][j] = INF;
      |             ~~~~~~~~~^~~~~
skyline.cpp:16:23: note: within this loop
   16 |         for(int j=0; j<=MAX_H; j++)
      |                      ~^~~~~~~

• Subtask 1: 0 / 100