Submission #987000

#	Time	Username	Problem	Language	Result	Execution time	Memory
987000		wood	Detecting Molecules (IOI16_molecules)	C++17	0 / 100	1 ms	348 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>  
using namespace std;
 
typedef long long ll;
typedef pair<int,int> p32;
typedef pair<ll,ll> p64;
#define pb push_back
#define eb emplace_back
#define fi first
#define se second
#define vi vector<int>
#define vp32 vector<p32>
#define fast_cin() ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL)
#define MOD %1000000007
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template <class T>
using Tree =
    tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
//never guess
//never debug without reviewing code
//never try adding ones or substracting them
//only step by step debug when necessay


std::vector<int> find_subset(int l, int u, std::vector<int> W) {
    vector<p64> w;
    ll totalsum = 0;
    for(int i = 0; i<W.size(); i++){ w.eb(W[i],i); totalsum+=W[i];}
    sort(w.begin(),w.end());
    ll sum = 0;
    if(w[0].fi>u||totalsum<l) return{};
    vi res;
    int i;
    for(i = 0; i<w.size()&&sum+w[i].fi<u; i++){
        sum+=w[i].fi; 
        res.pb(w[i].se);
    }
    sum-=w[i-1].fi;
    res.pop_back();
    while(i<W.size()){
        if(sum+w[i].fi<=u&&sum+w[i].fi>=l) res.pb(w[i].se);
        i++;
    }
    return res;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:30:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |     for(int i = 0; i<W.size(); i++){ w.eb(W[i],i); totalsum+=W[i];}
      |                    ~^~~~~~~~~
molecules.cpp:36:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |     for(i = 0; i<w.size()&&sum+w[i].fi<u; i++){
      |                ~^~~~~~~~~
molecules.cpp:42:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   42 |     while(i<W.size()){
      |           ~^~~~~~~~~

• Subtask 1: 0 / 9
• Subtask 2: 0 / 10
• Subtask 3: 0 / 12
• Subtask 4: 0 / 15
• Subtask 5: 0 / 23
• Subtask 6: 0 / 31