#include <bits/stdc++.h>
using namespace std;
/*<DEBUG>*/
#define tem template <typename
#define can_shift(_X_, ...) enable_if_t<sizeof test<_X_>(0) __VA_ARGS__ 8, debug&> operator<<(T i)
#define _op debug& operator<<
tem C > auto test(C *x) -> decltype(cerr << *x, 0LL);
tem C > char test(...);
tem C > struct itr{C begin, end; };
tem C > itr<C> get_range(C b, C e) { return itr<C>{b, e}; }
struct debug{
#ifdef _LOCAL
~debug(){ cerr << endl; }
tem T > can_shift(T, ==){ cerr << boolalpha << i; return *this; }
tem T> can_shift(T, !=){ return *this << get_range(begin(i), end(i)); }
tem T, typename U > _op (pair<T, U> i){
return *this << "< " << i.first << " , " << i.second << " >"; }
tem T> _op (itr<T> i){
*this << "{ ";
for(auto it = i.begin; it != i.end; it++){
*this << " , " + (it==i.begin?2:0) << *it;
}
return *this << " }";
}
#else
tem T> _op (const T&) { return *this; }
#endif
};
string _ARR_(int* arr, int sz){
string ret = "{ " + to_string(arr[0]);
for(int i = 1; i < sz; i++) ret += " , " + to_string(arr[i]);
ret += " }"; return ret;
}
#define exp(...) " [ " << #__VA_ARGS__ << " : " << (__VA_ARGS__) << " ]"
/*</DEBUG>*/
typedef long long ll;
typedef unsigned long long ull;
typedef unsigned int uint;
typedef pair<int, int> pii;
//mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
#define pb push_back
#define FAST ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0)
#define TC int __TC__; cin >> __TC__; while(__TC__--)
#define ar array
const int INF = 1e9 + 7, N = 1e6+100;
vector<int> teams[N];
set<ar<int,2>> ids;
int cur=0, mxcur = 0, mx=0, n;
ar<int,2> a[N];
int main(void)
{
FAST;
cin >> n;
for(int i = 0; i < n; ++i){
cin >> a[i][0];
a[i][1] = i;
}
sort(a, a+n);
mx = a[n-1][0];
int i = n-1;
while(i >= 0){
mxcur = a[i][0];
if(i+1 < mxcur) break;
teams[cur].pb(a[i][1]);
for(int j = 1; j < mxcur; ++j){
teams[cur].pb(a[i-j][1]);
}
ids.insert({mxcur, cur++});
i -= mxcur;
}
/*
debug() << exp(i);
for(int i = 0; i < cur; ++i){
debug() << exp(teams[i]);
}
*/
while(i >= 0 && (*ids.begin())[0] < mx){
auto it = ids.begin();
// debug() << exp(*it);
cur = (*it)[1];
for(int j = 0; i >= 0 && j < mx-(*it)[0]; --i, ++j){
teams[cur].pb(a[i][1]);
}
ids.erase(it);
ids.insert({(int)teams[cur].size(), cur});
}
for(; i >= 0; --i){
auto it = ids.begin();
cur = (*it)[1];
teams[cur].pb(a[i][1]);
ids.erase(it);
ids.insert({(int)teams[cur].size(), cur});
}
map<int, int> vis;
cout << ids.size() << '\n';
for(auto it : ids){
cout << it[0];
for(int i : teams[it[1]]) cout << ' ' << i+1;
cout << '\n';
}
return 0;
Compilation message
tea.cpp: In function 'int main()':
tea.cpp:119:10: error: expected '}' at end of input
119 | return 0;
| ^
tea.cpp:59:1: note: to match this '{'
59 | {
| ^
