Submission #236699

#	Time	Username	Problem	Language	Result	Execution time	Memory
236699		Mercenary	Teams (CEOI11_tea)	C++14	100 / 100	494 ms	86648 KiB

tea

#include<bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/trie_policy.hpp>

#define pb push_back
#define mp make_pair
#define taskname "A"

using namespace std;
using namespace __gnu_pbds;

typedef long long ll;
typedef long double ld;
typedef pair<int,int> ii;
typedef tree <int,null_type,less<int>,rb_tree_tag,tree_order_statistics_node_update> ordered_set;

const int maxn = 1e6 + 5;
const int mod = 1e9 + 7;
ii a[maxn];
vector<int> s[maxn];
int f[maxn];
int trace[maxn];
int n;
int dp[maxn];

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    if(fopen(taskname".INP","r")){
		freopen(taskname".INP", "r",stdin);
		freopen(taskname".OUT", "w",stdout);
    }
    cin >> n;
    for(int i = 1 ; i <= n ; ++i){
        cin >> a[i].first;
        a[i].second = i;
    }
    sort(a + 1 , a + n + 1);
    s[0].pb(0);
    int tmp = 0;
    priority_queue<ii , vector<ii> , greater<ii> > pq;
    for(int i = 1 ; i <= n ; ++i){
        while(pq.size() && pq.top().first <= i){
            s[dp[pq.top().second]].pb(pq.top().second);
            pq.pop();
        }
        if(i - a[i].first >= 0){
            tmp = f[i - a[i].first];
            trace[i] = *(upper_bound(s[tmp].begin(), s[tmp].end(), i - a[i].first) - 1);
            f[i] = max(tmp + 1 , f[i - 1]);
            dp[i] = tmp + 1;
            pq.push(mp(i + i - trace[i] , i));
        }else{
            f[i] = f[i - 1];
        }
    }
    cout << tmp + 1 << endl;
    while(n > 0){
        cout << n - trace[n] << " ";
        for(int i = trace[n] + 1 ; i <= n ; ++i){
            cout << a[i].second << " ";
            assert(a[i].first <= n - trace[n]);
        }
        cout << '\n';
        n = trace[n];
    }
}

Compilation message (stderr)

tea.cpp: In function 'int main()':
tea.cpp:31:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen(taskname".INP", "r",stdin);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
tea.cpp:32:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   freopen(taskname".OUT", "w",stdout);
   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 10 / 10
• Subtask 6: 10 / 10
• Subtask 7: 10 / 10
• Subtask 8: 10 / 10
• Subtask 9: 10 / 10
• Subtask 10: 10 / 10