Submission #482588

#	Time	Username	Problem	Language	Result	Execution time	Memory
482588		Hazem	Global Warming (CEOI18_glo)	C++14	15 / 100	2083 ms	1092 KiB

glo

#include <bits/stdc++.h>

#define LL long long
 
 
using namespace std;
 
const int N = 2e5+1;
const LL MOD = 1e9+7;

int a[N],dp[N];
int n,k;

int calc(){

    set<int>st;
    for(int i=1;i<=n;i++){
        if(st.find(a[i])!=st.end())continue;
        st.insert(a[i]);
        auto it = st.find(a[i]);
        it++;
        if(it==st.end())continue;
        st.erase(*it);
    }
    return st.size();
}

void op(int l,int r,int x){

    for(int i=l;i<=r;i++)
        a[i] += x;
}

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

    for(int i=1;i<=n;i++)
        scanf("%d",&a[i]);

    int ans = calc();
    for(int i=1;i<=n;i++){
        for(int j=-k;j<=k;j++){
            op(1,i,j);
            ans = max(ans,calc());
            op(1,i,-j);
            
            op(i,n,j);
            ans = max(ans,calc());
            op(i,n,-j);
        }
    }

    printf("%d\n",ans);
}   

Compilation message (stderr)

glo.cpp: In function 'int main()':
glo.cpp:36:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |     scanf("%d%d",&n,&k);
      |     ~~~~~^~~~~~~~~~~~~~
glo.cpp:39:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |         scanf("%d",&a[i]);
      |         ~~~~~^~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 0 / 13
• Subtask 4: 0 / 10
• Subtask 5: 0 / 20
• Subtask 6: 0 / 17
• Subtask 7: 0 / 25