이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace std;
using namespace __gnu_pbds;
typedef tree<int, null_type, less<int>, rb_tree_tag,tree_order_statistics_node_update> ordered_set;
#define scan(x) do{while((x=getchar())<'0'); for(x-='0'; '0'<=(_=getchar()); x=(x<<3)+(x<<1)+_-'0');}while(0)
char _;
#define complete_unique(a) a.erase(unique(a.begin(),a.end()),a.end())
#define all(a) a.begin(),a.end()
#define println printf("\n");
#define readln(x) getline(cin,x);
#define pb push_back
#define endl "\n"
#define INT_INF 0x3f3f3f3f
#define LL_INF 0x3f3f3f3f3f3f3f3f
#define MOD 1000000007
#define mp make_pair
#define fastio cin.tie(0); cin.sync_with_stdio(0);
#define MAXN 100005
#define MAXK 205
typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
typedef unordered_map<int,int> umii;
typedef pair<int,int> pii;
typedef pair<double,double> pdd;
typedef pair<ll,ll> pll;
typedef pair<int,pii> triple;
typedef int8_t byte;
mt19937 g1(time(0));
int randint(int a, int b){return uniform_int_distribution<int>(a, b)(g1);}
ll randlong(ll a,ll b){return uniform_int_distribution<long long>(a, b)(g1);}
ll gcd(ll a, ll b){return b == 0 ? a : gcd(b, a % b);}
ll lcm(ll a, ll b){return a*b/gcd(a,b);}
ll fpow(ll b, ll exp, ll mod){if(exp == 0) return 1;ll t = fpow(b,exp/2,mod);if(exp&1) return t*t%mod*b%mod;return t*t%mod;}
ll divmod(ll i, ll j, ll mod){i%=mod,j%=mod;return i*fpow(j,mod-2,mod)%mod;}
int len,K,arr[MAXN],par[MAXN][MAXK],ck,lst;
ll dp[MAXN][2],psa[MAXN];
void solve(int l, int r, int lp, int rp){
if(l > r) return;
// if(lp == rp){
// for(int i=l; i<=r; i++){
// ll cst = dp[lp][!lst]+(psa[i]-psa[lp])*psa[lp];
// dp[i][lst] = cst;
// par[i][ck] = lp;
// }
// return;
// }
int mid = (l+r)/2, np = lp, lim = min(mid-1,rp);
ll cur_best = dp[mid][lst] = LLONG_MIN;
for(int i=lp; i<=lim; i++){
ll cst = dp[i][!lst]+(psa[mid]-psa[i])*psa[i];
if(cst > cur_best){
cur_best = cst;
np = i;
}
}
dp[mid][lst] = cur_best;
par[mid][ck] = np;
solve(l,mid-1,lp,np);
solve(mid+1,r,np,rp);
}
int main(){
scanf("%d %d",&len,&K); K++;
for(int i=1; i<=len; i++){
scanf(" %d",&arr[i]);
psa[i] = psa[i-1]+arr[i];
}
for(ck=2; ck<=K; ck++){
lst = !lst;
solve(ck,len,ck-1,len);
}
printf("%lld\n",dp[len][lst]);
vector<int> v;
int curr = len;
for(int i=K; i>=1; i--){
if(i < K) v.pb(curr);
curr = par[curr][i];
}
for(int i=(int)v.size()-1; i>=0; i--)
printf("%d ",v[i]);
}
컴파일 시 표준 에러 (stderr) 메시지
sequence.cpp: In function 'int main()':
sequence.cpp:76:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d",&len,&K); K++;
~~~~~^~~~~~~~~~~~~~~~~
sequence.cpp:78:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf(" %d",&arr[i]);
~~~~~^~~~~~~~~~~~~~~
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