#include <bits/stdc++.h> /* Checklist: - Check statement: - Check filename: - Check test limit: - Stresstest: */ using namespace std; using ll = long long; // #define int long long #define pii pair<ll, ll> #define fi first #define se second const ll N = 350 + 5, inf = 1e9, mod = 1e9 + 7, block = 320, lim = 19; int n, k; string s; int total; int pfs[N]; int f[N][N][N]; int dp(int l, int r, int nowA) { // xet den doan [l, r], now la co bao nhieu mau do ma A da lay if (nowA >= k) return 0; if (l > r) return 1; if (f[l][r][nowA] != -1) return f[l][r][nowA]; int have = total - (pfs[r] - pfs[l - 1]); int nowB = have - nowA; // so mau do ma B da lay int nowturn = (l - 1) + (n - r); if (nowturn % 2 == 0) { // An int Win = 0; if (nowA + (s[l] == 'C') < k) { if (dp(l + 1, r, nowA + (s[l] == 'C'))) Win = 1; } if (Win == 0) { if (nowA + (s[r] == 'C') < k) { if (dp(l, r - 1, nowA + (s[r] == 'C'))) Win = 1; } } return f[l][r][nowA] = Win; } else { int Lose = 0; if (nowB + (s[l] == 'C') < k) { if (!dp(l + 1, r, nowA)) { return f[l][r][nowA] = 0; } } if (nowB + (s[r] == 'C') < k) { if (!dp(l, r - 1, nowA)) { return f[l][r][nowA] = 0; } } } return f[l][r][nowA] = 1; } signed main() { ios::sync_with_stdio(false); cin.tie(0); if (fopen("SGAME.inp", "r")) { freopen("SGAME.inp", "r", stdin); freopen("SGAME.out", "w", stdout); } int tc = 1; // cin >> tc; while(tc-- > 0) { cin >> n >> k; cin >> s; s = "#" + s; memset(f, -1, sizeof(f)); total = 0; for (int i = 1; i <= n; i++) { total += (s[i] == 'C'); pfs[i] = pfs[i - 1] + (s[i] == 'C'); } int ans = dp(1, n, 0); cout << (ans ? "DA" : "NE") << '\n'; } return 0; }

Main.cpp: In function 'int main()':
Main.cpp:64:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |         freopen("SGAME.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
Main.cpp:65:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   65 |         freopen("SGAME.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~