Submission #557057

#	Time	Username	Problem	Language	Result	Execution time	Memory
557057		Ai7081	Detecting Molecules (IOI16_molecules)	C++17	100 / 100	53 ms	8252 KiB

molecules

#include "molecules.h"
#include <bits/stdc++.h>
using namespace std;

vector<int> find_subset(int l, int u, vector<int> W) {
    vector<int> ret;
    vector<pair<long long, int>> w;
    for (int i=0; i<W.size(); i++) w.push_back({W[i], i});
    sort(w.begin(), w.end());
    long long now = w[0].first;
    int pl=0, pr=0;
    while (pl < w.size() && pr < w.size() && (now < l || now > u)) {
        if (now < l) {
            if (pr+1 < w.size()) now += w[++pr].first;
            else break;
        }
        if (now > u) {
            if (pl < w.size()) now -= w[pl++].first;
            else break;
        }
    }
    if (l <= now && now <= u) {
        for (int i=pl; i<=pr; i++) ret.push_back(w[i].second);
    }
    return ret;
}

Compilation message (stderr)

molecules.cpp: In function 'std::vector<int> find_subset(int, int, std::vector<int>)':
molecules.cpp:8:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |     for (int i=0; i<W.size(); i++) w.push_back({W[i], i});
      |                   ~^~~~~~~~~
molecules.cpp:12:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     while (pl < w.size() && pr < w.size() && (now < l || now > u)) {
      |            ~~~^~~~~~~~~~
molecules.cpp:12:32: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   12 |     while (pl < w.size() && pr < w.size() && (now < l || now > u)) {
      |                             ~~~^~~~~~~~~~
molecules.cpp:14:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   14 |             if (pr+1 < w.size()) now += w[++pr].first;
      |                 ~~~~~^~~~~~~~~~
molecules.cpp:18:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   18 |             if (pl < w.size()) now -= w[pl++].first;
      |                 ~~~^~~~~~~~~~

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