Submission #419398

#	Time	Username	Problem	Language	Result	Execution time	Memory
419398		Apiram	Handcrafted Gift (IOI20_gift)	C++14	35 / 100	441 ms	37396 KiB

gift

#include "gift.h"
#include<bits/stdc++.h>
using namespace std;
struct point {
int s,e,u;
};
vector<int64_t>tree;
int64_t func(int64_t a,int64_t b){
return a+b;
}
void build(int& n ,vector<int64_t>&arr){
while(__builtin_popcount(n)!=1){
++n;
arr.push_back(0);
}
tree.resize(2*n);
for (int i = 0;i<n;++i){
    tree[n+i]=arr[i];
}
for (int i =n-1;i>=1;--i){
	tree[i]=func(tree[2*i],tree[2*i+1]);
}
}
int64_t rangesum(int node,int low_node,int high_node,int qlow,int qhigh){
if (qlow<=low_node&&high_node<=qhigh)return tree[node];
if (high_node<qlow||qhigh<low_node){
return 0;
}
 
int mid = (low_node+high_node)/2;
return func(rangesum(2*node,low_node,mid,qlow,qhigh),rangesum(2*node + 1,mid+1,high_node,qlow,qhigh));
}
void update(int i , int v,int n){
tree[n+i]=v;
for (int j = (n+i)/2;j>=1;j/=2){
tree[j]=func(tree[j*2],tree[j*2 + 1]);
}
}
int construct(int n, int r, std::vector<int> a, std::vector<int> b, std::vector<int> x) {
    vector<point>arr,brr;
    vector<int64_t>crr(n,0);
    string s(n,'R');
    while(__builtin_popcount(n)!=1){
++n;
crr.push_back(0);
}
    build(n,crr);
    for (int i =0;i<r;++i){
    point p;
    p.s=a[i];
    p.e=b[i];
    p.u=x[i];
    if (p.u==2)arr.push_back(p);
    else brr.push_back(p);
    }
    
    sort(arr.begin(),arr.end(),[&](point i,point j){
        if (i.e==j.e)return i.s>j.s;
        return i.e<j.e;
    });
    sort(brr.begin(),brr.end(),[&](point i ,point j){
    	return i.s<j.s;
    	});
    for (int i =0;i<arr.size();++i){
    	int temp = rangesum(1,0,n-1,arr[i].s,arr[i].e);
    	if (temp + 1<arr[i].u){
    	for (int j = arr[i].s;j<=arr[i].e;++j){
    		bool ok=true;
    		for (auto y:brr){
    		if (y.s>j)break;
    		if (y.s<=j&&j<=y.e){
    		ok=false;break;
    		}
    		}
    		if (ok){
    		s[j]='B';
    		update(j,1,n);
    		break;
    		}
    		else if (j==arr[i].e)return 0;
    		
    	}
    	} 
    }
    for (int i =0;i<brr.size();++i){
    if (rangesum(1,0,n-1,brr[i].s,brr[i].e)+1>brr[i].u)return 0;
    }
    craft(s);
    return 1;
    }

Compilation message (stderr)

gift.cpp: In function 'int construct(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
gift.cpp:64:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<point>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   64 |     for (int i =0;i<arr.size();++i){
      |                   ~^~~~~~~~~~~
gift.cpp:85:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<point>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   85 |     for (int i =0;i<brr.size();++i){
      |                   ~^~~~~~~~~~~

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