Submission #569613

#	Time	Username	Problem	Language	Result	Execution time	Memory
569613		CSQ31	Teams (IOI15_teams)	C++17	77 / 100	4098 ms	294956 KiB

teams

#pragma GCC optimize("Ofast") 
#include "teams.h"
#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> pii;
#define fi first
#define se second
const int MAXN = 5e5+5;
struct node{
	int x,lf = -1,rg = -1;
	node(){}
};
node T[MAXN*40];
int ccnt = 0;
void pull(int v){
	T[v].x = 0;
	if(T[v].lf!=-1)T[v].x+=T[T[v].lf].x;
	if(T[v].rg!=-1)T[v].x+=T[T[v].rg].x;
}
int copy(int v){
	T[++ccnt] = T[v];
	return ccnt;
}
int add(int v,int l,int r,int pos,int x){
	int me = copy(v);
	if(l==r){
		T[me].x+=x;
		return me;
	}
	int tm = (l+r)/2;
	if(pos<=tm){
		if(T[v].lf == -1)T[v].lf = ++ccnt;
		T[me].lf = add(T[v].lf,l,tm,pos,x);
	}else{
		if(T[v].rg == -1)T[v].rg = ++ccnt;
		T[me].rg = add(T[v].rg,tm+1,r,pos,x);
	}
	pull(me);
	return me;
}
int query(int v,int l,int r,int tl,int tr){
	if(l<=tl && tr<=r)return T[v].x;
	int tm = (tl+tr)/2;
	if(r<=tm)return T[v].lf == -1?0:query(T[v].lf,l,r,tl,tm);
	if(l >tm)return T[v].rg == -1?0:query(T[v].rg,l,r,tm+1,tr);
	int res = 0;
	res += T[v].lf == -1?0:query(T[v].lf,l,tm,tl,tm);
	res += T[v].rg == -1?0:query(T[v].rg,tm+1,r,tm+1,tr);
	return res;
	
}
vector<int>seg;
int n;
void init(int N, int A[], int B[]) {
	n = N;
	seg.push_back(0);
	vector<map<int,int>>cnt(n+1);
	for(int i=0;i<n;i++)cnt[A[i]][B[i]]++;
	for(int i=1;i<=n;i++){
		seg.push_back(copy(seg.back()));
		for(auto x:cnt[i]){
			//cout<<i<<" "<<x.fi<<" "<<x.se<<'\n';
			seg.back() = add(seg.back(),1,n,x.fi,x.se);
		}
	}
}
int can(int m, int K[]) {
	int sum = 0;
	map<int,int>cnt;
	for(int i=0;i<m;i++){
		sum+=K[i];
		cnt[K[i]]++;
		if(sum>n)return 0;
	}
	vector<pii>a;
	for(auto x:cnt)a.push_back(x);
	a.push_back({n+1,0});
	int s = a.size();
	vector<int>need(s,0);
	vector<int>have(s,0);
	for(int i=0;i<s;i++)need[i] = a[i].fi * a[i].se;
	for(int i=0;i<s;i++){
		int l = 0,r = a[i].fi;
		if(i)l = a[i-1].fi;
		for(int j=i;j+1<s;j++){
			int L = a[j].fi;
			int R = a[j+1].fi-1;
			have[j]+=query(seg[r],L,R,1,n);
			have[j]-=query(seg[l],L,R,1,n);
		}
		for(int j=i;j<s;j++){
			if(!need[i])break;
			if(have[j]){
				int tmp = min(have[j],need[i]);
				need[i]-=tmp;
				have[j]-=tmp;
			}
		}
	}
	for(int x:need){
		if(x)return 0;
	}
	return 1;
}

Compilation message (stderr)

teams.cpp: In function 'int can(int, int*)':
teams.cpp:78:16: warning: conversion from 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   78 |  int s = a.size();
      |          ~~~~~~^~

• Subtask 1: 21 / 21
• Subtask 2: 13 / 13
• Subtask 3: 43 / 43
• Subtask 4: 0 / 23