Submission #721897

#	Time	Username	Problem	Language	Result	Execution time	Memory
721897		sunnat	Uplifting Excursion (BOI22_vault)	C++14	5 / 100	641 ms	2460 KiB

vault

#include <algorithm>
#include <iostream>
#include <vector>
#include <queue>
#include <cmath>
#include <map>
#include <set>
using namespace std;

int main(){
    vector<int> dp[2];
    int n, m, res = -1;
    cin >> n >> m;
    vector<int>a(2*n+1);
    int q = 65000;
    for(int i = 0; i < a.size(); i ++)
        cin >> a[i];
    dp[1].resize(2*q+1, -1);
    dp[1][q] = 0;
    for(int val = -n; val <= n; val ++){
        // cout << val << endl;
        if(val == 0) continue;
        dp[0]  = dp[1];
        int v = val + n;
        for(int cnt = 1; cnt <= a[v]; cnt ++){
            for(int sum = -q; sum <= q; sum ++){
                if(dp[1][sum+q] != -1)
                    //if(-q <= sum+val*cnt && sum+val*cnt <= q)
                        dp[0][sum+val*cnt+q] = max(dp[0][sum+val*cnt+q], dp[1][sum+q] + cnt);
            }
        }
        dp[1] = dp[0];
    }
    if(-q<=m && m <= q && dp[1][m+q] != -1)
        cout << dp[1][m+q] + a[n];
    else
        cout << "impossible";
    return 0;
}

Compilation message (stderr)

vault.cpp: In function 'int main()':
vault.cpp:16:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |     for(int i = 0; i < a.size(); i ++)
      |                    ~~^~~~~~~~~~
vault.cpp:12:15: warning: unused variable 'res' [-Wunused-variable]
   12 |     int n, m, res = -1;
      |               ^~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 15
• Subtask 3-1: 0 / 10
• Subtask 3-2: 0 / 10
• Subtask 4-1: 0 / 10
• Subtask 4-2: 0 / 10
• Subtask 5-1: 0 / 10
• Subtask 5-2: 0 / 10
• Subtask 6-1: 0 / 10
• Subtask 6-2: 0 / 10