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>
using namespace std;
typedef long long ll;
#define int ll
#define rep(i, n) for(int i = 1; i <= n; ++i)
#define forn(i, l, r) for(int i = l; i <= r; ++i)
#define ford(i, r, l) for(int i = r; i >= l; --i)
#define FOR(i, n) for(int i = 0; i < n; ++i)
#define fi first
#define se second
#define pii pair<int, int>
#define pll pair<ll, ll>
#define pb push_back
#define endl "\n"
#define task "split"
#define sz(a) int(a.size())
#define C(x, y) make_pair(x, y)
#define all(a) (a).begin(), (a).end()
#define bit(i, mask) (mask >> i & 1)
template<typename T> bool maximize(T &res, const T &val) { if (res < val){ res = val; return true; }; return false; }
template<typename T> bool minimize(T &res, const T &val) { if (res > val){ res = val; return true; }; return false; }
inline int readInt() {char c;while(c=getchar(),c!='-'&&(c<'0'||c>'9'));bool sign=(c=='-');if(sign)c=getchar();int n=c-'0';while(c=getchar(),c>='0'&&c<='9')n=10*n+c-'0';return(!sign)?n:-n;}
inline ll readLong() {char c;while(c=getchar(),c!='-'&&(c<'0'||c>'9'));bool sign=(c=='-');if(sign)c=getchar();ll n=c-'0';while(c=getchar(),c>='0'&&c<='9')n=10*n+c-'0';return(!sign)?n:-n;}
inline string readString() {char c;while(c=getchar(),c==' '||c=='\n'||c=='\t');string s({c});while(c=getchar(),c!=EOF&&c!=' '&&c!='\n'&&c!='\t')s+=c;return s;}
const int N = 1e5 + 4;
const int M = 3e5 + 3;
const int INF = 1e9 + 3;
const ll LINF = 1e18;
const int A = 26 + 2;
const int K = 200 + 3;
int n, k;
int a[N];
int sum[N];
ll dp[N][K];
int opt[N][K];
ll cost(int i, int j)
{
if(sum[j] - sum[i - 1] == 0) return 0;
if(sum[i - 1] == 0) return 0;
return (sum[i - 1] > LINF / (sum[j] - sum[i - 1])) ? LINF : 1ll * (sum[i - 1]) * (sum[j] - sum[i - 1]);
}
int j = 0;
void dnc(int l, int r, int optl, int optr)
{
if(l > r) return;
int mid = l + r >> 1;
opt[mid][j] = optl;
forn(k, optl, min(optr, mid))
if(maximize(dp[mid][j], dp[k - 1][j - 1] + cost(k, mid)))
opt[mid][j] = k;
dnc(l, mid - 1, optl, opt[mid][j]);
dnc(mid + 1, r, opt[mid][j], optr);
}
void solve()
{
cin >> n >> k;
rep(i, n) cin >> a[i], sum[i] = sum[i - 1] + a[i];
dp[0][0] = 0;
rep(i, n) dp[i][0] = -LINF;
rep(_, k + 1)
{
++j;
forn(i, 0, n) dp[i][j] = -LINF;
dnc(1, n, 1, n);
}
cout << dp[n][k + 1] << endl;
int x = n;
ford(i, k, 1)
{
x = opt[x][i + 1] - 1;
cout << x << " ";
}
}
signed main()
{
ios_base::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
int TC = 1;
if(fopen(task".inp", "r"))
{
freopen(task".inp", "r", stdin);
freopen(task".out", "w", stdout);
}
while(TC--)
{
solve();
cout << endl;
}
return 0;
}
컴파일 시 표준 에러 (stderr) 메시지
sequence.cpp: In function 'void dnc(ll, ll, ll, ll)':
sequence.cpp:61:17: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
61 | int mid = l + r >> 1;
| ~~^~~
sequence.cpp: In function 'int main()':
sequence.cpp:103:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
103 | freopen(task".inp", "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
sequence.cpp:104:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
104 | freopen(task".out", "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
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