Submission #989463

#TimeUTC-0UsernameProblemLanguageResultExecution timeMemory
9894632024-05-28 08:20:40khanhtbSplit the sequence (APIO14_sequence)C++14
0 / 100
52 ms131072 KiB
#include<bits/stdc++.h>
#define ll long long
#define ull unsigned long long
#define ld double
#define pb push_back
#define pf push_front
#define vi vector<ll>
#define vii vector<vi>
#define pll pair<ll,ll>
#define vpll vector<pll>
#define all(a) a.begin(), a.end()
#define fi first
#define se second
using namespace std;
const ll mod = 1e9+7;
const ll inf = 1e18;
const ll base = 31;
const ll blocksz = 320;
const ll N = 1e5+8;
ll pre[N],pre2[N],n,a[N],dp[N][208],k,trace[N][20];
ll cost(ll l, ll r){
return ((pre[r]-pre[l-1])*(pre[r]-pre[l-1])-(pre2[r]-pre2[l-1]))/2;
}
void dnc(ll l, ll r, ll optl, ll optr, ll j){
if(l > r) return;
ll m = l+r>>1;
pll best = {inf,-1};
for(ll i = optl; i <= min(m,optr); i++){
best = min(best,{dp[i][j-1]+cost(i+1,m),i});
}
 
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Compilation message (stderr)

sequence.cpp: In function 'void dnc(long long int, long long int, long long int, long long int, long long int)':
sequence.cpp:26:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   26 |     ll m = l+r>>1;
      |            ~^~
sequence.cpp: In function 'int main()':
sequence.cpp:56:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   56 |         freopen("test.inp","r",stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~
sequence.cpp:57:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |         freopen("test.out","w",stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~
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