Submission #530174

#	Time	Username	Problem	Language	Result	Execution time	Memory
530174		Lawliet	Teams (CEOI11_tea)	C++17	0 / 100	256 ms	104516 KiB

tea

#include <bits/stdc++.h>

using namespace std;

const int MAXN = 1000010;
const int INF = 1000000010;

int n;

int v[MAXN];
int ord[MAXN];

int maxSize[MAXN];
int dp[MAXN], opt[MAXN];

vector<int> indValues[MAXN];
vector<int> transitions[MAXN];

int main()
{
    scanf("%d",&n);

    for(int i = 1 ; i <= n ; i++)
    {
        scanf("%d",&v[i]);
        indValues[ v[i] ].push_back( i );
    }

    int cnt = 0;

    for(int i = n ; i > 0 ; i--)
        while( !indValues[i].empty() )
            ord[++cnt] = indValues[i].back(), indValues[i].pop_back();

    for(int i = 1 ; i < v[ ord[1] ] ; i++)
        dp[i] = -INF;

    dp[ v[ ord[1] ] ] = 1;
    opt[ v[ ord[1] ] ] = 1;
    maxSize[ v[ ord[1] ] ] = v[ ord[1] ];
    transitions[ v[ ord[1] ] ].push_back( v[ ord[1] ] );

    for(int i = v[ ord[1] ] + 1 ; i <= n ; i++)
    {
        dp[i] = dp[i - 1];
        opt[i] = opt[i - 1];
        maxSize[i] = maxSize[i - 1];

        if( (i - 1)%maxSize[i - 1] == 0 && (i - 1)/maxSize[i - 1] == dp[i - 1] )
            maxSize[i]++;

        if( v[ ord[i] ] + i - 1 <= n )
            transitions[ v[ ord[i] ] + i - 1 ].push_back( i );

        for(int j = 0 ; j < (int)transitions[i].size() ; j++)
        {
            int last = transitions[i][j];
            int newSize = max( maxSize[last - 1] , i - last + 1 );

            if( dp[i] < dp[last - 1] + 1 )
                dp[i] = dp[last - 1] + 1, maxSize[i] = newSize, opt[i] = last;
            else if( dp[i] == dp[last - 1] + 1 && maxSize[i] > newSize )
                maxSize[i] = newSize, opt[i] = last;
        }
    }

    printf("%d\n",dp[n]);

    int last = n;

    for(int i = 1 ; i <= dp[n] ; i++, last = opt[last] - 1)
    {
        printf("%d ",last - opt[last] + 1);

        for(int j = opt[last] ; j <= last ; j++)
            printf("%d ",ord[j]);

        printf("\n");
    }
}

Compilation message (stderr)

tea.cpp: In function 'int main()':
tea.cpp:21:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   21 |     scanf("%d",&n);
      |     ~~~~~^~~~~~~~~
tea.cpp:25:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   25 |         scanf("%d",&v[i]);
      |         ~~~~~^~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 10
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 10
• Subtask 6: 0 / 10
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• Subtask 10: 0 / 10