結果
問題 | No.1117 数列分割 |
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; }