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Submission #495226

# Submission time Handle Problem Language Result Execution time Memory
495226 2021-12-18T07:24:05 Z pragmatist Gift (IZhO18_nicegift) C++14
7 / 100
 2000 ms 4996 KB 
#include <bits/stdc++.h>                            
 
#define pb push_back
#define sz(v) (int)v.size()
#define all(v) v.begin(),v.end()
#define rall(v) v.rbegin(),v.rend()
#define x first
#define y second
#define int long long
#define nl "\n"
 
using namespace std;

typedef long long ll;
typedef pair<long long, long long> pll;
typedef pair <ll, ll> pii;

const int N = (int)3e5 + 7;
const int M = (int)7e6 + 7;
const ll MOD = (ll)1e9 + 7;                    
const int inf = (int)1e9 + 7;
const ll INF = (ll)3e18 + 7;

pii dir[] = {{-1, -1}, {1, 1}, {-1, 1}, {1, -1}};

int n, k;
pii a[N];

void solve() {          	             
	cin >> n >> k;
	int sum = 0;
	for(int i = 1; i <= n; ++i) {
		cin >> a[i].x;
		a[i].y = i;
		sum += a[i].x;
	}
	sort(a + 1, a + 1 + n);
	if(sum % k || a[n].x > sum - a[n].x) cout << "-1\n", exit(0);
	cout << sum / 2 << nl;
	for(int i = 1; i <= sum / 2; ++i) {
		cout << "1 " << a[n].y << ' ' << a[n-1].y << nl;
		a[n].x--;
		a[n-1].x--;
		sort(a + 1, a + 1 + n); 
	}
}

signed main() {                   
	ios_base::sync_with_stdio(NULL);
    cin.tie(0);
    cout.tie(0);
   	int test = 1;
	//cin >> test;
	for(int i = 1; i <= test; ++i) {
        //cout << "Case " << i << ": ";
        solve();
    }
    return 0;
}

Subtask #1
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB n=4
2 Correct 0 ms 204 KB n=3
3 Correct 0 ms 204 KB n=3
4 Correct 0 ms 316 KB n=4
5 Correct 0 ms 204 KB n=4
6 Correct 0 ms 204 KB n=2

Subtask #2
0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB n=4
2 Correct 0 ms 204 KB n=3
3 Correct 0 ms 204 KB n=3
4 Correct 0 ms 316 KB n=4
5 Correct 0 ms 204 KB n=4
6 Correct 0 ms 204 KB n=2
7 Correct 0 ms 204 KB n=5
8 Correct 0 ms 204 KB n=8
9 Correct 4 ms 332 KB n=14
10 Correct 3 ms 332 KB n=11
11 Execution timed out 2058 ms 1224 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #3
0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB n=4
2 Correct 0 ms 204 KB n=3
3 Correct 0 ms 204 KB n=3
4 Correct 0 ms 316 KB n=4
5 Correct 0 ms 204 KB n=4
6 Correct 0 ms 204 KB n=2
7 Correct 0 ms 204 KB n=5
8 Correct 0 ms 204 KB n=8
9 Correct 4 ms 332 KB n=14
10 Correct 3 ms 332 KB n=11
11 Execution timed out 2058 ms 1224 KB Time limit exceeded
12 Halted 0 ms 0 KB -

Subtask #4
0 / 19.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2094 ms 4996 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #5
0 / 51.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 204 KB n=4
2 Correct 0 ms 204 KB n=3
3 Correct 0 ms 204 KB n=3
4 Correct 0 ms 316 KB n=4
5 Correct 0 ms 204 KB n=4
6 Correct 0 ms 204 KB n=2
7 Correct 0 ms 204 KB n=5
8 Correct 0 ms 204 KB n=8
9 Correct 4 ms 332 KB n=14
10 Correct 3 ms 332 KB n=11
11 Execution timed out 2058 ms 1224 KB Time limit exceeded
12 Halted 0 ms 0 KB -