제출 #671302

#제출 시각아이디문제언어결과실행 시간메모리
671302hct_2so1K blocks (IZhO14_blocks)C++17
컴파일 에러
0 ms0 KiB
#include <bits/stdc++.h> using namespace std; typedef long long ll; const int N = 1e5 + 5; const ll INF = 1e18 + 7; ll dp[N][3], n, k, a[N], st[4 * N]; void update(int id, int l, int r, int pos, ll val) { if (l > r || pos < l || r < pos) return ; if (l == r) { st[id] = val; return ; } int mid = (l + r) / 2; if (pos <= mid) update(id * 2, l, mid, pos, val); else update(id * 2 + 1, mid + 1, r, pos, val); st[id] = min(st[id * 2], st[id * 2 + 1]); } int main() { std::ios_base::sync_with_stdio(0); cin.tie(0); freopen("blocks.in", "r", stdin); freopen("blocks.out", "w", stdout); cin>>n>>k; for (int i = 1; i<=n; i++) cin>>a[i], dp[i][1] = max(dp[i - 1][1], a[i]); for (int i = 1; i<=4*n; i++) st[i] = INF; for (int j = 2; j<=k; j++) { stack<pair<int, ll>> st; int cur = k & 1; for (int i = j; i<=n; i++) { ll minF = dp[i - 1][1 - cur]; while (s.size() && a[s.top().first] <= a[i]) update(1, 1, n, s.top().first, INF), minF = min(minF, s.top().second), s.pop_back(); dp[i][cur] = min(st[1], minF + a[i]); update(1, 1, n, i, dp[i][cur]); s.push_back({i, minF}); } } //for (int i = 2; i<=n; i++) cout<<dp[i][k & 1]<<' '; cout<<dp[n][k & 1]; return 0; }

컴파일 시 표준 에러 (stderr) 메시지

blocks.cpp: In function 'int main()':
blocks.cpp:38:20: error: 's' was not declared in this scope
   38 |             while (s.size() && a[s.top().first] <= a[i])
      |                    ^
blocks.cpp:40:32: error: no match for 'operator[]' (operand types are 'std::stack<std::pair<int, long long int> >' and 'int')
   40 |             dp[i][cur] = min(st[1], minF + a[i]);
      |                                ^
blocks.cpp:42:13: error: 's' was not declared in this scope
   42 |             s.push_back({i, minF});
      |             ^
blocks.cpp:26:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   26 |     freopen("blocks.in", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
blocks.cpp:27:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   27 |     freopen("blocks.out", "w", stdout);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~