제출 #238075

#제출 시각아이디문제언어결과실행 시간메모리
238075luciocfK개의 묶음 (IZhO14_blocks)C++14
100 / 100
250 ms45288 KiB
#include <bits/stdc++.h> #define ff first #define ss second using namespace std; typedef pair<int, int> pii; const int maxn = 1e5+10; const int maxk = 110; const int inf = 1e9+10; int n, k; int a[maxn]; int mn[maxn]; int dp[maxn][maxk]; int main(void) { scanf("%d %d", &n, &k); for (int i = 1; i <= n; i++) scanf("%d", &a[i]); dp[0][1] = inf, dp[1][1] = a[1]; for (int i = 2; i <= n; i++) dp[i][1] = max(a[i], dp[i-1][1]); for (int j = 2; j <= k; j++) { stack<pii> stk; for (int i = 0; i < j; i++) dp[i][j] = inf; for (int i = j; i <= n; i++) { mn[i] = dp[i-1][j-1]; dp[i][j] = inf; while (stk.size() && stk.top().ff <= a[i]) { mn[i] = min(mn[i], mn[stk.top().ss]); stk.pop(); } if (!stk.empty()) dp[i][j] = dp[stk.top().ss][j]; dp[i][j] = min(dp[i][j], a[i]+mn[i]); stk.push({a[i], i}); } } printf("%d\n", dp[n][k]); }

컴파일 시 표준 에러 (stderr) 메시지

blocks.cpp: In function 'int main()':
blocks.cpp:23:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d", &n, &k);
  ~~~~~^~~~~~~~~~~~~~~~~
blocks.cpp:26:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &a[i]);
   ~~~~~^~~~~~~~~~~~~
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