Submission #1263985

#	Time	Username	Problem	Language	Result	Execution time	Memory
1263985		herominhsteve	Volontiranje (COCI21_volontiranje)	C++20	0 / 110	1 ms	324 KiB

Main

#include <bits/stdc++.h>
#define el '\n'
#define FNAME "NAME"
#define allof(x) x.begin(),x.end()
#define allof1(x) x.begin()+1,x.end()
#define mset(x,n) memset(x,(n),sizeof(x))
using namespace std;
const long long MOD = (long long) 1e9+7;
template<class X,class Y> bool minimize(X &a,Y b){ if (a>b) {a=b; return true;} return false;}
template<class X,class Y> bool maximize(X &a,Y b){ if (a<b) {a=b; return true;} return false;}

void setup(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);cout.tie(0);
	if (fopen(FNAME".inp","r")){
		freopen(FNAME".inp","r",stdin);
		freopen(FNAME".out","w",stdout);
	}
}

template<typename T>
struct FenwickTree{
    int n;
    vector<T> bit;
    FenwickTree(int N=0){
        n=N;
        if (n>0){
            bit.resize(n+1,0);
        }
    }
    void update(int node,T val){
        while (node<=n){
            maximize(bit[node],val);
            node += (node & -node);
        }
    }
    T getVal(int node){
        T res=0;
        while (node>0){
            maximize(res,bit[node]);
            node -= (node & -node);
        }
        return res;
    }
};

FenwickTree<int> bit;

int n;
vector<int> a;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

void gen(){
    cout<<n<<el;
    vector<int> b(allof(a));
    shuffle(allof(b),rng);
    for (int x:b) cout<<x<<" ";
}

void init(){
	cin>>n;
    a.resize(n);
    for (int &x:a) cin>>x;
    bit = FenwickTree<int>(n);
    // gen();
}

void sol(){
	vector<int> dp(n,0);
    for (int i=0;i<n;i++){
        dp[i] = bit.getVal(a[i]-1) + 1;
        bit.update(a[i],dp[i]);
    }
    int maxLen = bit.getVal(n);
    vector<int> id;
    for (int i=0;i<n;i++) if (dp[i]==maxLen) id.push_back(i);
    // cerr<<maxLen<<el;
    vector<vector<int>> res;
    vector<bool> visited(n,0);
    while (!id.empty()){
        int curLen = maxLen;
        int big = id.back(); id.pop_back();
        int curMax = a[big]+1;
        vector<int> path;
        for (int i=big;i>=0 and curLen>0;i--){
            if (a[i] < curMax and dp[i]==curLen and !visited[i]){
                path.push_back(i);
                curLen--;
                curMax = a[i];
                visited[i] = 1;
            }
        }
        reverse(allof(path));
        // for (int x : path) cerr<<x<<" "<<el;
        res.push_back(path);
    }
    cout<<res.size()<<" "<<maxLen<<el;
    for (vector<int> v : res){
        for (int x : v) cout<<x+1<<" ";
        cout<<el;
    }
}

int main(){
    setup();
    init();
    sol();
}

Compilation message (stderr)

Main.cpp: In function 'void setup()':
Main.cpp:16:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |                 freopen(FNAME".inp","r",stdin);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:17:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |                 freopen(FNAME".out","w",stdout);
      |                 ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 0 / 10
• Subtask 2: 0 / 40
• Subtask 3: 0 / 60