| # | Submission time | Handle | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 50942 | 2018-06-15T06:57:54 Z | spencercompton | ICC (CEOI16_icc) | C++17 | 0 ms | 0 KB |
// #include "icc.h"
#include <bits/stdc++.h>
using namespace std;
// int query(int a, int b, int c[], int d[]){
// cout << "A " << endl;
// for(int i = 0; i<a; i++){
// cout << c[i] << " ";
// }
// cout << endl;
// for(int i = 0; i<b; i++){
// cout << d[i] << " ";
// }
// cout << endl;
// int x;
// cin >> x;
// return x;
// }
// void setRoad(int a, int b){
// cout << "! " << a << " " << b << endl;
// }
int n;
void findRoad(){
int a[n/2];
int b[n-n/2];
int ar[n];
for(int i = 0; i<n; i++){
ar[i] = i+1;
}
while(true){
for(int i = 0; i+1<n; i++){
int rem = n-i-1;
int ra = i + (rand()%rem) + 1;
swap(ar[i],ar[ra]);
}
for(int i = 0; i<n; i++){
if(i<n/2){
a[i] = ar[i];
}
else{
b[i-n/2] = ar[i];
}
}
if(query(n/2,n-n/2,a,b)){
int low1 = 0;
int high1 = n/2-1;
while(low1<high1){
int mid = (low1+high1)/2;
int ta[mid+1];
for(int i = 0; i<=mid; i++){
ta[i] = a[i];
}
if(query(mid+1,n-n/2,ta,b)){
high1 = mid;
}
else{
low1 = mid+1;
}
}
int low2 = 0;
int high2 = n-n/2-1;
while(low2<high2){
int mid = (low2+high2)/2;
int tb[mid+1];
for(int i = 0; i<=mid; i++){
tb[i] = b[i];
}
if(query(n/2,mid+1,a,tb)){
high2 = mid;
}
else{
low2 = mid+1;
}
}
int ans1 = a[low1];
int ans2 = b[low2];
if(ans1>ans2){
swap(ans1,ans2);
}
setRoad(ans1,ans2);
break;
}
}
}
void run(int N){
n = N;
for(int n=1; n<N; n++)
findRoad();
}
int main(){
run(4);
}