| # | Time | Username | Problem | Language | Result | Execution time | Memory |
|---|---|---|---|---|---|---|---|
| 904874 | KK_1729 | Handcrafted Gift (IOI20_gift) | C++17 | 0 ms | 0 KiB |
This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include "gift.h"
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define FOR(i,a,b) for (int i = (a); i < (b); ++i)
#define pb push_back
#define all(a) a.begin(), a.end()
#define endl "\n"
void printVector(vector<int> a){
for (auto x: a) cout << x << " ";
cout << endl;
}
bool compare(pair<int, int> x, pair<int, int> y){
if (x.first < y.first) return true;
if (x.first == y.first){
if (x.second < y.second) return true;
}
return false;
}
bool intersect(pair<int, int> x, pair<int, int> y){
if (y.first < x.first) swap(x, y);
if (x.second >= y.first) return true;
return false;
}
int construct(int n, int r, vector<int> a, vector<int> b, vector<int> x) {
vector<int> ans(n);
vector<int> component(n);
vector<pair<int, int>> first;
vector<pair<int, int>> second;
FOR(i,0,r){
int l = a[i]; int r = b[i]; int t = x[i];
if (t == 1){
first.pb({l, r});
}else{
second.pb({l, r});
}
}
FOR(i,0,n) first.pb({i, i});
sort(all(first));
vector<pair<int, int>> ranges;
pair<int, int> current = {0, 0};
FOR(i,0,first.size()){
if (i == 0){
current = first[i];
continue;
}
if (intersect(first[i], current)){
current.second = max(current.second, first[i].second);
}else{
ranges.pb(current);
current = first[i];
}
}
ranges.pb(current);
int comp = 0;
// cout << endl;
for (auto x: ranges){
FOR(i,x.first,x.second+1){
component[i] = comp;
if (comp%2){
ans[i] = 0;
}else{
ans[i] = 1;
}
}
comp++;
}
for (auto x: second){
if (component[x.first] == component[x.second]){
return 0;
}
}
string answer = "";
for (auto x: ans){
if (x) answer+='R';
else answer+='B';
}
// cout << answer << endl;
craft(answer);
return 1;
}