Submission #542821

#	Time	Username	Problem	Language	Result	Execution time	Memory
542821		Sho10	Mechanical Doll (IOI18_doll)	C++17	100 / 100	135 ms	11008 KiB

doll

#include <bits/stdc++.h> //Andrei Alexandru a.k.a Sho
#include "doll.h"
using ll=int;
using ld=long double;
int const INF=1000000005;
ll const LINF=1000000000000000005;
ll const mod=1000000007;
ld const PI=3.14159265359;
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#define f first
#define s second
#define pb push_back
#define mp make_pair
#define endl '\n'
#define CODE_START  ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
using namespace std;
ll lt[300005],rt[300005],cnt=0,switches=0,val=0,nr=0,ans[300005],b[300005];
ll build(ll node,ll realnodes){
if(realnodes==0){
    return -1;
}
if(node==1){
    return (nr++);
}
ll centr=-(++switches);
lt[-centr]=build(node/2,realnodes-min(node/2,realnodes));
rt[-centr]=build(node/2,min(node/2,realnodes));
return centr;
}
ll dfs(ll node){
if(node>=0){
    return node;
}
b[-node]=!b[-node];
if(b[-node]==1){
    return dfs(lt[-node]);
}else return dfs(rt[-node]);
}
void create_circuit(int m,vector<int>a){
map<ll,ll>viz;
vector<ll>C;
for(int i=0;i<=m;i++)
{
    C.pb(-1);
}
ll x=a.size();
nr=0;
x++;
ll nodes=1;
while(nodes<x){
    nodes*=2;
}
build(nodes,x);
a.pb(0);
for(ll i=0;i<a.size();i++)
{
ans[dfs(-1)]=a[i];
}
vector<int>X,Y;
for(ll i=1;i<=switches;i++)
{
ll x,y;
x=lt[i];
y=rt[i];
if(x>=0){
    X.pb(ans[x]);
}else {
X.pb(x);
}
if(y>=0){
        Y.pb(ans[y]);
}else Y.pb(y);
}
return answer(C,X,Y);
}

Compilation message (stderr)

doll.cpp:6:15: warning: overflow in conversion from 'long int' to 'll' {aka 'int'} changes value from '1000000000000000005' to '-1486618619' [-Woverflow]
    6 | ll const LINF=1000000000000000005;
      |               ^~~~~~~~~~~~~~~~~~~
doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:56:13: warning: comparison of integer expressions of different signedness: 'll' {aka 'int'} and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   56 | for(ll i=0;i<a.size();i++)
      |            ~^~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 4 / 4
• Subtask 3: 10 / 10
• Subtask 4: 10 / 10
• Subtask 5: 18 / 18
• Subtask 6: 56 / 56