Submission #144171

#	Time	Username	Problem	Language	Result	Execution time	Memory
144171		Swan	Global Warming (CEOI18_glo)	C++14	25 / 100	2092 ms	3688 KiB

glo

#include <bits/stdc++.h>
#define stop system("pause")
#define INP freopen("input.txt","r",stdin)
#define OUTP freopen("solve1.txt","w",stdout)
using namespace std;

typedef long long ll;
const int maxn = 200123;
ll dp[maxn];

void clean(int mx){
    dp[0] = -1e16;
    for(int i(1);i <=mx;i++)dp[i] = 1e16;
}

int get_lis(vector<ll>& v){
    clean(v.size());
    int ans = 0;
    for(int i(0); i < v.size();i++){
        int mx = upper_bound(dp,dp+i+1,v[i])-dp;
        //cout << mx << ' ' << v[mx-2] << ' ' << v[i] << endl;
        if(mx!=1 && dp[mx-1] >= v[i])continue;
        dp[mx] = min(dp[mx],v[i]);
        ans = max(ans,mx);
    }
    return ans;
}

main()
{
    ios_base::sync_with_stdio(0);
    ll n,x; cin >> n >> x;
    vector<ll> v;
    for(int i(0); i < n;i++){
        int w; cin >> w;
        v.push_back(w);
    }
    int ans = 0;
    if(x == 0){
        cout << get_lis(v);
        return 0;
    }
    vector<ll> start;
    start = v;
    for(int i(0); i < n;i++){
        for(int r(i); r < n;r++){
            for(int pl(-x);pl<=x;pl++){
                for(int z(i);z<=r;z++){
                    v[z]=start[z]+pl;
                }
                ans = max(ans,get_lis(v));
            }
            for(int z(i);z<=r;z++)v[z]=start[z];
        }
    }
    cout << ans;
    return 0;
}
/*
6 2
1 2 1 3 2 1
1
0
*/

Compilation message (stderr)

glo.cpp: In function 'int get_lis(std::vector<long long int>&)':
glo.cpp:19:21: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i(0); i < v.size();i++){
                   ~~^~~~~~~~~~
glo.cpp: At global scope:
glo.cpp:29:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^

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