Submission #1207822

#TimeUsernameProblemLanguageResultExecution timeMemory
1207822Zbyszek99Fireworks (APIO16_fireworks)C++20
Compilation error
0 ms0 KiB
#include <bits/stdc++.h> #define ll long long #define ld long double #define vi vector<int> #define vl vector<long long> #define ff first #define ss second #define pii pair<int,int> #define pll pair<long long, long long> #define pb push_back #define rep(i, b) for(int i = 0; i < (b); ++i) #define rep2(i,a,b) for(int i = a; i <= (b); ++i) #define rep3(i,a,b,c) for(int i = a; i <= (b); i+=c) #define count_bits(x) __builtin_popcountll((x)) #define all(x) (x).begin(),(x).end() #define siz(x) (int)(x).size() #define forall(it,x) for(auto& it:(x)) using namespace std; //mt19937 mt;void random(){mt.seed(chrono::time_point_cast<chrono::milliseconds>(chrono::high_resolution_clock::now()).time_since_epoch().count());} //ll rand(ll a, ll b) {return a + (mt() % (b-a+1));} const int INF = 1e9+50; const ll INF_L = 1e18+40; const ll MOD = 1e9+7; struct dp { multiset<ll> points; ll init_slope = 0; void merge(dp other) { init_slope += other.init_slope; forall(it,other.points) { points.insert(it); } } void add_edge(ll x) { ll cur_slope = init_slope + siz(points); ll opt_poz = 0; ll prev = 0; while(true) { auto cur = points.end(); cur--; prev = opt_poz; opt_poz = *cur; cur_slope--; // cout << opt_poz << " " << cur_slope << " slope\n"; points.erase(points.find(opt_poz)); if(cur_slope == -1) { break; } } points.insert(opt_poz+x); points.insert(prev+x); } }; vi graph[300'001]; ll edge[300'001]; dp dfs(int v) { dp ans; if(siz(graph[v]) == 0) { ans.init_slope = -1; ans.points = {{edge[v]],edge[v]}}; } else { bool was = 0; forall(it,graph[v]) { dp new_dp = dfs(it); if(!was) { was = 1; ans = new_dp; } else { if(siz(new_dp.points) > siz(ans.points)) { swap(ans,new_dp); } ans.merge(new_dp); } } if(v != 1) ans.add_edge(edge[v]); } return ans; } int main() { ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0); //random(); int n,m; cin >> n >> m; ll cur_ans = 0; rep2(i,2,n+m) { int p; cin >> p >> edge[i]; cur_ans += edge[i]; graph[p].pb(i); } dp ans = dfs(1); ll ans_ = cur_ans; ll cur_slope = ans.init_slope; ll prev_point = 0; forall(it,ans.points) { cur_ans += cur_slope * (it-prev_point); prev_point = it; cur_slope++; ans_ = min(ans_,cur_ans); } cout << ans_; }

Compilation message (stderr)

fireworks.cpp: In function 'dp dfs(int)':
fireworks.cpp:70:31: error: expected '}' before ']' token
   70 |         ans.points = {{edge[v]],edge[v]}};
      |                       ~       ^
fireworks.cpp:70:31: error: expected '}' before ']' token
   70 |         ans.points = {{edge[v]],edge[v]}};
      |                      ~        ^
fireworks.cpp:70:31: error: expected ';' before ']' token
   70 |         ans.points = {{edge[v]],edge[v]}};
      |                               ^
      |                               ;
fireworks.cpp:70:41: warning: no return statement in function returning non-void [-Wreturn-type]
   70 |         ans.points = {{edge[v]],edge[v]}};
      |                                         ^
fireworks.cpp: At global scope:
fireworks.cpp:71:5: error: expected declaration before '}' token
   71 |     }
      |     ^
fireworks.cpp:72:5: error: expected unqualified-id before 'else'
   72 |     else
      |     ^~~~
fireworks.cpp:94:5: error: expected unqualified-id before 'return'
   94 |     return ans;
      |     ^~~~~~
fireworks.cpp:95:1: error: expected declaration before '}' token
   95 | }
      | ^