diff --git a/g0rnn/README.md b/g0rnn/README.md index 39441b4..c772e8f 100644 --- a/g0rnn/README.md +++ b/g0rnn/README.md @@ -14,6 +14,7 @@ | 10차시 | 2024.12.20 | 그래프 | [결혼식](https://www.acmicpc.net/problem/5567) | https://github.com/AlgoLeadMe/AlgoLeadMe-12/pull/40 | | 11차시 | 2024.12.30 | dp | [기타리스트](https://www.acmicpc.net/problem/1495) | https://github.com/AlgoLeadMe/AlgoLeadMe-12/pull/49 | | 12차시 | 2025.01.02 | bfs | [회장뽑기](https://www.acmicpc.net/problem/2660) | https://github.com/AlgoLeadMe/AlgoLeadMe-12/pull/50 | +| 13차시 | 2025.01.05 | 백트래킹 | [스타트와 링크](https://www.acmicpc.net/problem/14889) | https://github.com/AlgoLeadMe/AlgoLeadMe-12/pull/52 | --- diff --git a/g0rnn/backtracking/13-g0rnn.cpp b/g0rnn/backtracking/13-g0rnn.cpp new file mode 100644 index 0000000..e6449d7 --- /dev/null +++ b/g0rnn/backtracking/13-g0rnn.cpp @@ -0,0 +1,50 @@ +// +// Created by 김균호 on 2025. 1. 5.. +// +#include +#include +#include +using namespace std; + +int n, minDiff = INT_MAX; +int s[25][25]; +vector visited; + +void sumPoint() { + int start = 0, link = 0; + for (int i = 1; i <= n; i++) { + for (int j = i + 1; j <= n; j++) { + if (visited[i] && visited[j]) start += s[i][j] + s[j][i]; + else if (!visited[i] && !visited[j]) link += s[i][j] + s[j][i]; + } + } + minDiff = min(minDiff, abs(start - link)); +} + +// 임의의 n/2개를 뽑음 +void dfs(int cur, int cnt) { + if (cnt == n / 2) { + sumPoint(); + return; + } + for (int i = cur; i <= n; i++) { + if (!visited[i]) { + visited[i] = true; + dfs(i + 1, cnt + 1); + visited[i] = false; + } + } +} + +int main() { + cin >> n; + for (int y = 1; y <= n; y++) { + for (int x = 1; x <= n; x++) { + cin >> s[y][x]; + } + } + visited = vector(n + 1, false); + dfs(1, 0); + cout << minDiff; + return 0; +}