제출 #871448

#제출 시각아이디문제언어결과실행 시간메모리
871448Cyber_WolfThe short shank; Redemption (BOI21_prison)C++17
15 / 100
177 ms4468 KiB
#include <bits/stdc++.h> using namespace std; #define lg long long #define fastio ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0); const lg N = 505; lg n, d, tim; lg dp[N][N]; lg t[N], lst[N]; vector<lg> o[N]; lg C(lg i, lg j) { lg ans = o[j].size()-(lower_bound(o[j].begin(), o[j].end(), i)-o[j].begin()); return ans; } int main() { fastio; cin >> n >> d >> tim; for(int i = 1; i <= n; i++) { cin >> t[i]; } for(int i = 1; i <= n; i++) { for(int j = i; j >= 1; j--) { if(t[j]+i-j <= tim) { lst[i] = j; break; } } o[i].push_back(lst[i]); for(auto it : o[i-1]) o[i].push_back(it); sort(o[i].begin(), o[i].end()); } d = min(n, d); t[0] = 1e18; memset(dp, 0x3f, sizeof(dp)); // for(int i = 1; i <= n; i++) // { // for(int j = 1; j <= n; j++) // { // if(j < i) cout << "0 "; // else cout << C(i, j) << ' '; // } // cout << '\n'; // } // cout << '\n'; dp[0][d] = 0; for(int i = 1; i <= n; i++) dp[i][d] = C(1, i); for(int i = 1; i <= n; i++) { for(int j = 0; j < d; j++) { for(int k = i-1; k >= 0; k--) { dp[i][j] = min(dp[k][j+1]+C(k+1, i), dp[i][j]); } } } lg ans = n+1; for(int j = 0; j <= d; j++) { ans = min(ans, dp[n][j]); } cout << ans << '\n'; }
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