Submission #485281

#	Time	Username	Problem	Language	Result	Execution time	Memory
485281		malar	Handcrafted Gift (IOI20_gift)	C++14	15 / 100	161 ms	15060 KiB

gift

#include <bits/stdc++.h>
#include "gift.h"
using namespace std;
#include <algorithm>
#include <vector>
#include <cassert>
#include <cstdio>
#include <string>
 
vector<int>parent;
int construct(int n, int r, std::vector<int> a, std::vector<int> b, std::vector<int> x) {
    parent.resize(n); 
    for(int l=0;l<n;l++) 
        parent[l]=l; 
    for(int i = 0; i < r; i++){
        if(x[i] == 2) continue;
 		
                for (int e = a[i] + 1; e < b[i] + 1; e++)
                    parent[e] = parent[b[i]];
        
        }
       
    
    for(int i=0; i < r; i++) {
        if(x[i] == 1) continue;
        if(a[i] == b[i]) return 0;
         if (parent[b[i]] - parent[a[i]] < 1)
                    return 0;
        }
        
    
    
 
 
string s ="R";
for(int i=1;i<n;i++)
    {
        if(parent[i] != parent[i-1])
            if(s.back() == 'R')s += "B";
            else s+= "R";
        else s+= s.back();
    }
    craft(s);
    return 1;
}

• Subtask 1: 0 / 10
• Subtask 2: 15 / 15
• Subtask 3: 0 / 20
• Subtask 4: 0 / 25
• Subtask 5: 0 / 30