oj.uz

Submission #859066

# Submission time Handle Problem Language Result Execution time Memory
859066 2023-10-09T15:51:40 Z NaimSS Gift (IZhO18_nicegift) C++14
100 / 100
 1580 ms 119800 KB 
#include <bits/stdc++.h>
#include <iostream>
// #define int long long
#define ld long double
#define fastio ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define pb push_back
#define mp(a,b) make_pair(a,b)
#define ms(v,x) memset(v,x,sizeof(v))
#define all(v) v.begin(),v.end()
#define ff first
#define ss second
#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define per(i, a, b) for(int i = b-1; i>=a ; i--)
#define trav(a, x) for(auto& a : x)
#define allin(a , x) for(auto a : x)
#define Unique(v) sort(all(v)),v.erase(unique(all(v)),v.end());
#define sz(v) ((int)v.size())
using namespace std;
typedef vector<int> vi;
#define y1 abacaba
//#define left oooooopss
#define db(x) cerr << #x <<" == "<<x << endl;
#define db2(x,y) cerr<<#x <<" == "<<x<<", "<<#y<<" == "<<y<<endl;
#define db3(x,y,z) cerr << #x<<" == "<<x<<", "<<#y<<" == "<<y<<", "<<#z<<" == "<<z<<endl;
typedef long long ll;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;
typedef vector<ll> vl;
// std::mt19937_64 rng64((int) std::chrono::steady_clock::now().time_since_epoch().count());
std::mt19937 rng(
  
//  (int) std::chrono::steady_clock::now().time_since_epoch().count()
   1239010
);
ll cdiv(ll a, ll b) { return a/b+((a^b)>0&&a%b); } // divide a by b rounded up
ll fdiv(ll a, ll b) { return a/b-((a^b)<0&&a%b); } // divide a by b rounded down
//inline ll mod(ll n, ll m ){ ll ret = n%m; if(ret < 0) ret += m; return ret; }
ll gcd(ll a, ll b){return (b == 0LL ? a : gcd(b, a%b));}
ll exp(ll b,ll e,ll m){
    b%=m;
    ll ans = 1;
    for (; e; b = b * b % m, e /= 2)
        if (e & 1) ans = ans * b % m;
    return ans;
}
// debug:
template<class T>void print_vector(vector<T> &v){
    rep(i,0,sz(v))cout<<v[i]<<" \n"[i==sz(v)-1];
}
void dbg_out() {cerr << endl; }
template<typename Head, typename ... Tail> void dbg_out(Head H,Tail... T){
    cerr << ' ' << H;
    dbg_out(T...);
}
#ifdef LOCAL
#define dbg(...) cerr << "(" << #__VA_ARGS__ << "):", dbg_out(__VA_ARGS__), cerr << endl
#else
#define dbg(...) 42
#endif
//

const int N = 1e6 + 100;
ll a[N];

const ll inf = (ll)1e18 + 9;
ll mult(ll a,ll b){
	if(a > inf/b)return inf;
	return a*b;
}

int32_t main(){
    fastio;
	int n,k;
	cin >> n >> k;
	ll sum=0;
	rep(i,0,n){
		cin >> a[i];
		sum += a[i];
	}
	if(sum%k != 0){
		cout << -1 << endl;
		return 0;
	}
	vector<pair<ll,vi> > res;

	ll divi = sum/k;
	rep(i,0,n)if(a[i] > divi){
		cout << -1 << endl;
		return 0;
	}
	vector<vector<pll>> nv;
	int pt=0;

	while(pt < n){
		ll need = divi;
		vector<pll> here;
		while(need > 0){
			while(pt < n && a[pt]==0)pt++;
			assert(pt < n);
			ll put = min(a[pt], need);
			if(a[pt] > divi){
				cout << -1 << endl;
				return 0;
			}
			a[pt] -= put;
			need -= put;
			assert(put > 0 && need>=0 && a[pt] >= 0);
			here.pb(pll(put , pt));
		}
		while(pt < n && a[pt]==0)pt++;
		nv.pb(here);
	}
	for(auto &v : nv)reverse(all(v));
	ll put = 0;
	while(divi > 0){
		ll mn = inf;

		for(auto &v : nv){
			mn = min(mn,v.back().ff);
		}
		divi -= mn;
		
		vi here;
		for(auto &v : nv){
			here.pb(v.back().ss);
			v.back().ff -= mn;
			while(sz(v) && v.back().ff == 0)v.pop_back();
		}
		assert(mn > 0);
		res.pb({mn, here});
	}
 

	rep(i,0,n)assert(a[i]==0);
	// cout << "ok" << endl;
	// return 0;


	cout << sz(res) << endl;

	for(auto [X,v] : res){
		cout << X << " ";
		for(auto id : v)cout << id + 1<<" ";
		cout << endl;
	}

	// math -> gcd it all
    // Did you swap N,M? N=1?
}

Compilation message

nicegift.cpp: In function 'int32_t main()':
nicegift.cpp:141:11: warning: structured bindings only available with '-std=c++17' or '-std=gnu++17'
  141 |  for(auto [X,v] : res){
      |           ^
nicegift.cpp:114:5: warning: unused variable 'put' [-Wunused-variable]
  114 |  ll put = 0;
      |     ^~~

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB n=4
2 Correct 0 ms 348 KB n=3
3 Correct 0 ms 344 KB n=3
4 Correct 0 ms 344 KB n=4
5 Correct 0 ms 348 KB n=4
6 Correct 0 ms 348 KB n=2

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB n=4
2 Correct 0 ms 348 KB n=3
3 Correct 0 ms 344 KB n=3
4 Correct 0 ms 344 KB n=4
5 Correct 0 ms 348 KB n=4
6 Correct 0 ms 348 KB n=2
7 Correct 0 ms 348 KB n=5
8 Correct 0 ms 348 KB n=8
9 Correct 0 ms 348 KB n=14
10 Correct 0 ms 348 KB n=11
11 Correct 63 ms 7364 KB n=50000
12 Correct 69 ms 6676 KB n=50000
13 Correct 1 ms 348 KB n=10
14 Correct 2 ms 348 KB n=685
15 Correct 2 ms 348 KB n=623
16 Correct 2 ms 348 KB n=973

Subtask #3
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB n=4
2 Correct 0 ms 348 KB n=3
3 Correct 0 ms 344 KB n=3
4 Correct 0 ms 344 KB n=4
5 Correct 0 ms 348 KB n=4
6 Correct 0 ms 348 KB n=2
7 Correct 0 ms 348 KB n=5
8 Correct 0 ms 348 KB n=8
9 Correct 0 ms 348 KB n=14
10 Correct 0 ms 348 KB n=11
11 Correct 63 ms 7364 KB n=50000
12 Correct 69 ms 6676 KB n=50000
13 Correct 1 ms 348 KB n=10
14 Correct 2 ms 348 KB n=685
15 Correct 2 ms 348 KB n=623
16 Correct 2 ms 348 KB n=973
17 Correct 2 ms 348 KB n=989
18 Correct 1 ms 348 KB n=563
19 Correct 2 ms 604 KB n=592
20 Correct 2 ms 604 KB n=938
21 Correct 2 ms 408 KB n=747
22 Correct 3 ms 604 KB n=991

Subtask #4
19.0 / 19.0

# Verdict Execution time Memory Grader output
1 Correct 821 ms 71312 KB n=1000000
2 Correct 407 ms 45136 KB n=666666
3 Correct 179 ms 25324 KB n=400000
4 Correct 563 ms 52016 KB n=285714
5 Correct 4 ms 1372 KB n=20000
6 Correct 392 ms 41136 KB n=181818
7 Correct 2 ms 860 KB n=10000
8 Correct 22 ms 3544 KB n=6666
9 Correct 1 ms 604 KB n=4000
10 Correct 117 ms 17748 KB n=2857
11 Correct 1 ms 604 KB n=2000

Subtask #5
51.0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 348 KB n=4
2 Correct 0 ms 348 KB n=3
3 Correct 0 ms 344 KB n=3
4 Correct 0 ms 344 KB n=4
5 Correct 0 ms 348 KB n=4
6 Correct 0 ms 348 KB n=2
7 Correct 0 ms 348 KB n=5
8 Correct 0 ms 348 KB n=8
9 Correct 0 ms 348 KB n=14
10 Correct 0 ms 348 KB n=11
11 Correct 63 ms 7364 KB n=50000
12 Correct 69 ms 6676 KB n=50000
13 Correct 1 ms 348 KB n=10
14 Correct 2 ms 348 KB n=685
15 Correct 2 ms 348 KB n=623
16 Correct 2 ms 348 KB n=973
17 Correct 2 ms 348 KB n=989
18 Correct 1 ms 348 KB n=563
19 Correct 2 ms 604 KB n=592
20 Correct 2 ms 604 KB n=938
21 Correct 2 ms 408 KB n=747
22 Correct 3 ms 604 KB n=991
23 Correct 821 ms 71312 KB n=1000000
24 Correct 407 ms 45136 KB n=666666
25 Correct 179 ms 25324 KB n=400000
26 Correct 563 ms 52016 KB n=285714
27 Correct 4 ms 1372 KB n=20000
28 Correct 392 ms 41136 KB n=181818
29 Correct 2 ms 860 KB n=10000
30 Correct 22 ms 3544 KB n=6666
31 Correct 1 ms 604 KB n=4000
32 Correct 117 ms 17748 KB n=2857
33 Correct 1 ms 604 KB n=2000
34 Correct 35 ms 4968 KB n=23514
35 Correct 36 ms 4888 KB n=23514
36 Correct 2 ms 344 KB n=940
37 Correct 0 ms 348 KB n=2
38 Correct 192 ms 14212 KB n=100000
39 Correct 173 ms 14044 KB n=100000
40 Correct 0 ms 344 KB n=10
41 Correct 1 ms 348 KB n=100
42 Correct 5 ms 860 KB n=1000
43 Correct 1499 ms 113212 KB n=1000000
44 Correct 1580 ms 119800 KB n=1000000
45 Correct 1108 ms 91168 KB n=666666
46 Correct 719 ms 60012 KB n=400000
47 Correct 110 ms 17492 KB n=2336
48 Correct 546 ms 54068 KB n=285714
49 Correct 419 ms 41460 KB n=181818
50 Correct 182 ms 25024 KB n=40000
51 Correct 152 ms 20936 KB n=20000
52 Correct 125 ms 18828 KB n=10000
53 Correct 122 ms 18460 KB n=6666
54 Correct 133 ms 18004 KB n=4000
55 Correct 120 ms 17876 KB n=2857
56 Correct 112 ms 16932 KB n=2000