Submission #1104993

#TimeUsernameProblemLanguageResultExecution timeMemory
1104993dophuK blocks (IZhO14_blocks)C++17
0 / 100
13 ms84304 KiB
#include <bits/stdc++.h> #define ll long long #define pll pair<ll,ll> #define fi first #define se second #define pb push_back using namespace std; const ll mod=1e9+7; const ll inf=1e17; const ll N=1e5+2; const ll blocks=1e2+2; ll dp[N][blocks]; ll rm[N][32]; ll a[N]; ll n,k; void build(ll lgg) { for (ll i=1;i<=lgg;i++) { for (ll j=1;j+(1<<i)-1<=n;j++) { rm[j][i]=max(rm[j][i-1],rm[j+(1<<(i-1))][i-1]); } } } ll get(ll l,ll r) { ll k=__lg(r-l+1); return max(rm[l][k],rm[r-(1<<k)+1][k]); } ll minn[N]; stack <pll> st[blocks]; signed main() { ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0); if (fopen("p1.inp","r")) { freopen("p1.inp","r",stdin); freopen("p1.out","w",stdout); } if (fopen("blocks.in","r")) { freopen("blocks.in","r",stdin); freopen("blocks.out","w",stdout); } memset(dp,0x3f3f,sizeof(dp)); cin>>n>>k; for (ll i=1;i<=n;i++) { cin>>a[i]; rm[i][0]=a[i]; } build(__lg(n)); for (ll i=1;i<=n;i++) dp[i][1]=get(1,i); st[1].push({a[1],1}); for (ll i=2;i<=k;i++) { st[i].push({a[1],1}); for (ll j=i;j<=n;j++) { dp[j][i]=dp[j-1][i-1]+a[i]; /// 1 elm ll init=dp[j-1][i-1]; /// xet cac ptu tang dan while (st[i].size() && a[st[i].top().second] <= a[j]) { init=min(init,st[i].top().first); st[i].pop(); } if (!st[i].size()) { continue; } else { dp[j][i]=dp[st[i].top().second][i]; } dp[j][i]=min(dp[j][i],init+a[i]); st[i].push({init,j}); } } cout<<dp[n][k]; return 0; }

Compilation message (stderr)

blocks.cpp: In function 'int main()':
blocks.cpp:35:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 |       freopen("p1.inp","r",stdin);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~
blocks.cpp:36:14: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   36 |       freopen("p1.out","w",stdout);
      |       ~~~~~~~^~~~~~~~~~~~~~~~~~~~~
blocks.cpp:39:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   39 |         freopen("blocks.in","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
blocks.cpp:40:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   40 |         freopen("blocks.out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
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