Submission #415208

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
415208	2021-05-31 16:49:20	tengiz05	The Xana coup (BOI21_xanadu)	C++17	100 / 100	154 ms	39368 KiB

xanadu

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#include <bits/stdc++.h>
using i64 = long long;
constexpr int N = 1e5;
i64 dp[N][2][2], a[N];
std::vector<int> e[N];
struct opt{
    std::vector<i64> pr;
    i64 sum;
    opt(std::vector<i64> a, std::vector<i64> b) : pr(a.size() + 1), sum(0) {
        std::vector<i64> v;
        for (int i = 0; i < int(a.size()); i++) {
            v.push_back(-a[i] + b[i]);
        }
        sort(v.begin(), v.end());
        for (int i = 0; i < int(v.size()); i++) {
            sum += a[i];
            pr[i + 1] = pr[i] + v[i];
        }
    }
    i64 odd() {
        i64 res = 1e9;
        for (int i = 1; i < pr.size(); i += 2) {
            res = std::min(res, pr[i] + sum);
        }
        return res;
    }
    i64 even() {
        i64 res = 1e9;
        for (int i = 0; i < pr.size(); i += 2) {
            res = std::min(res, pr[i] + sum);
 
 
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

xanadu.cpp: In member function 'i64 opt::odd()':
xanadu.cpp:22:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   22 |         for (int i = 1; i < pr.size(); i += 2) {
      |                         ~~^~~~~~~~~~~
xanadu.cpp: In member function 'i64 opt::even()':
xanadu.cpp:29:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   29 |         for (int i = 0; i < pr.size(); i += 2) {
      |                         ~~^~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 10 / 10
• Subtask 4: 40 / 40
• Subtask 5: 30 / 30