結果
| 問題 |
No.1117 数列分割
|
| コンテスト | |
| ユーザー |
|
| 提出日時 | 2020-07-17 22:00:12 |
| 言語 | C++17 (gcc 13.3.0 + boost 1.87.0) |
| 結果 |
WA
|
| 実行時間 | - |
| コード長 | 4,184 bytes |
| コンパイル時間 | 1,708 ms |
| コンパイル使用メモリ | 129,484 KB |
| 最終ジャッジ日時 | 2025-01-11 22:38:23 |
|
ジャッジサーバーID (参考情報) |
judge3 / judge3 |
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| ファイルパターン | 結果 |
|---|---|
| sample | AC * 3 |
| other | AC * 23 WA * 3 |
コンパイルメッセージ
main.cpp: In function ‘int main()’:
main.cpp:136:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
136 | ll n, k, m; scanf("%lld %lld %lld", &n, &k, &m);
| ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
main.cpp:137:55: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
137 | vector<ll> a(n); for (int i = 0; i < n; i++) scanf("%lld", &a[i]);
| ~~~~~^~~~~~~~~~~~~~~
ソースコード
#include <cstdio>
#include <iostream>
#include <string>
#include <sstream>
#include <stack>
#include <algorithm>
#include <cmath>
#include <queue>
#include <map>
#include <set>
#include <cstdlib>
#include <bitset>
#include <tuple>
#include <assert.h>
#include <deque>
#include <bitset>
#include <iomanip>
#include <limits>
#include <chrono>
#include <random>
#include <array>
#include <unordered_map>
#include <functional>
#include <complex>
#include <numeric>
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
//constexpr long long MAX = 5100000;
constexpr long long INF = 1LL << 60;
constexpr int inf = 1000000007;
//constexpr long long mod = 1000000007LL;
constexpr long long mod = 998244353LL;
const long double PI = acos((long double)(-1));
using namespace std;
typedef unsigned long long ull;
typedef long long ll;
typedef long double ld;
template< typename Monoid, typename OperatorMonoid = Monoid >
struct LazySegmentTree {
using F = function< Monoid(Monoid, Monoid) >;
using G = function< Monoid(Monoid, OperatorMonoid) >;
using H = function< OperatorMonoid(OperatorMonoid, OperatorMonoid) >;
int sz, height;
vector< Monoid > data;
vector< OperatorMonoid > lazy;
const F f;
const G g;
const H h;
const Monoid M1;
const OperatorMonoid OM0;
LazySegmentTree(int n, const F f, const G g, const H h,
const Monoid& M1, const OperatorMonoid OM0)
: f(f), g(g), h(h), M1(M1), OM0(OM0) {
sz = 1;
height = 0;
while (sz < n) sz <<= 1, height++;
data.assign(2 * sz, M1);
lazy.assign(2 * sz, OM0);
}
void set(int k, const Monoid& x) {
data[k + sz] = x;
}
void build() {
for (int k = sz - 1; k > 0; k--) {
data[k] = f(data[2 * k + 0], data[2 * k + 1]);
}
}
inline void propagate(int k) {
if (lazy[k] != OM0) {
lazy[2 * k + 0] = h(lazy[2 * k + 0], lazy[k]);
lazy[2 * k + 1] = h(lazy[2 * k + 1], lazy[k]);
data[k] = reflect(k);
lazy[k] = OM0;
}
}
inline Monoid reflect(int k) {
return lazy[k] == OM0 ? data[k] : g(data[k], lazy[k]);
}
inline void recalc(int k) {
while (k >>= 1) data[k] = f(reflect(2 * k + 0), reflect(2 * k + 1));
}
inline void thrust(int k) {
for (int i = height; i > 0; i--) propagate(k >> i);
}
void update(int a, int b, const OperatorMonoid& x) {
if (a >= b) return;
thrust(a += sz);
thrust(b += sz - 1);
for (int l = a, r = b + 1; l < r; l >>= 1, r >>= 1) {
if (l & 1) lazy[l] = h(lazy[l], x), ++l;
if (r & 1) --r, lazy[r] = h(lazy[r], x);
}
recalc(a);
recalc(b);
}
Monoid query(int a, int b) {
if (a >= b) return M1;
thrust(a += sz);
thrust(b += sz - 1);
Monoid L = M1, R = M1;
for (int l = a, r = b + 1; l < r; l >>= 1, r >>= 1) {
if (l & 1) L = f(L, reflect(l++));
if (r & 1) R = f(reflect(--r), R);
}
return f(L, R);
}
Monoid operator[](const int& k) {
return query(k, k + 1);
}
};
int main()
{
/*
cin.tie(nullptr);
ios::sync_with_stdio(false);
*/
ll n, k, m; scanf("%lld %lld %lld", &n, &k, &m);
vector<ll> a(n); for (int i = 0; i < n; i++) scanf("%lld", &a[i]);
vector<ll> sum(n + 1); for (int i = 0; i < n; i++) sum[i + 1] = sum[i] + a[i];
vector<vector<ll>> dp(n + 1, vector<ll>(k + 1, -INF));
vector<ll> mx1(k + 1, -INF), mx2(k + 1, -INF);
dp[0][0] = 0;
mx1[0] = 0;
mx2[0] = 0;
for (int i = 0; i < n; i++) {
for (int j = 1; j <= k; j++) {
chmax(dp[i + 1][j], mx1[j - 1] - sum[i + 1]);
chmax(dp[i + 1][j], mx2[j - 1] + sum[i + 1]);
}
for (int j = 0; j <= k; j++) {
chmax(mx1[j], dp[i + 1][j] + sum[i + 1]);
chmax(mx2[j], dp[i + 1][j] - sum[i + 1]);
}
}
cout << dp[n][k] << endl;
return 0;
}