Submission #1197018

#TimeUsernameProblemLanguageResultExecution timeMemory
1197018mychecksedadSki 2 (JOI24_ski2)C++20
0 / 100
2113 ms869404 KiB
/* Author : Mychecksdead */ #include<bits/stdc++.h> using namespace std; #define ll long long int #define MOD (1000000000+7) #define MOD1 (998244353) #define pb push_back #define all(x) x.begin(), x.end() #define en cout << '\n' #define ff first #define ss second #define pii pair<int,int> #define vi vector<int> const int N = 300+5, M = 1e5+10, K = 52, MX = 30; const ll INF = 1e14; int n; ll k, p[605], dp[605][N][N][2], mn[605]; array<ll, 2> a[N]; void solve(){ cin >> n >> k; int m; for(int i = 1; i <= n; ++i){ cin >> a[i][0] >> a[i][1]; ++a[i][0]; m = max(m, (int)a[i][0] + n + 1); } ll ans = INF; for(int i = 0; i <= m; ++i) p[i] = 0, mn[i] = INF; for(int i = 1; i <= n; ++i){ p[a[i][0]]++; mn[a[i][0]] = min(mn[a[i][0]], a[i][1]); } for(int i = 1; i <= m; ++i) p[i] += p[i - 1], mn[i] = min(mn[i], mn[i - 1]); for(int h = 0; h <= m; ++h){ for(int i = 0; i <= n; ++i){ for(int l = 0; l <= n; ++l) dp[h][i][l][0] = dp[h][i][l][1] = INF; } } sort(a+1, a+1+n); dp[0][0][0][0] = 0; for(int h = 1; h <= a[n][0] + n; ++h){ for(int j = 0; j <= p[h - 1]; ++j){ int sz = j + p[h] - p[h - 1]; for(int mx = sz; mx <= n; ++mx){ dp[h][0][mx][1] = min(dp[h][0][mx][1], dp[h - 1][j][mx][1]); } } for(int j = 0; j <= p[h - 1]; ++j){ for(int i = 0; i <= p[h] - p[h - 1] + j; ++i){ int sz = p[h] - p[h - 1] + j - i; for(int mx = 1; mx < min(p[h] + 1, j + p[h] - p[h - 1]); ++mx){ dp[h][i][max(sz, mx)][1] = min(dp[h][i][max(sz, mx)][1], dp[h - 1][j][mx][1] + max(0ll, (sz - mx) * mn[h - 1])); } } } for(int i = 0; i <= p[k]; ++i) for(int mx = 0; mx <= p[h]; ++mx) dp[h][i][mx][1] = min(INF, dp[h][i][mx][1] + i * k); if(p[h] > p[h - 1]){ dp[h][p[h] - 1][1][1] = min(dp[h][p[h] - 1][1][1], dp[h - 1][p[h - 1]][0][0] + (p[h] - 1) * k); } dp[h][p[h]][0][0] = min(dp[h][p[h]][0][0], dp[h - 1][p[h - 1]][0][0] + p[h] * k); } for(int h = a[n][0]; h <= a[n][0] + n; ++h){ for(int mx = 1; mx <= n; ++mx) ans = min(ans, dp[h][0][mx][1]); } cout << ans; } int main(){ cin.tie(0); ios::sync_with_stdio(0); int tt = 1, aa; // freopen("in.txt", "r", stdin); // freopen("out.txt", "w", stdout); while(tt--){ solve(); en; } cerr<<"time taken : "<<(float)clock()/CLOCKS_PER_SEC<<" seconds\n"; return 0; }
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