Submission #172673

#TimeUsernameProblemLanguageResultExecution timeMemory
172673SwanK blocks (IZhO14_blocks)C++14
0 / 100
48 ms41660 KiB
#include <bits/stdc++.h> using namespace std; int dp[105][100005]; int a[100005]; int n,k; int main(){ scanf("%d %d",&n,&k); int maxv = 0; memset(dp,0x3f,sizeof(dp)); for (int i=1; i<=n; i++) { scanf("%d",&a[i]); maxv = max(maxv,a[i]); dp[1][i] = maxv; } for (int i=2; i<=k; i++) { stack<int> s1,s2; for (int j=1; j<=n; j++) { int my_dp = dp[i-1][j-1]; while (!s1.empty() && a[s1.top()] < a[j]) { //if(k==2 && j == 1)cout << my_dp << ' ' << s1.top() << endl; my_dp = min(my_dp,s2.top()); s1.pop(); s2.pop(); } if(s1.size() && j>=i)dp[i][j] = dp[i][s1.top()]; s1.push(j); s2.push(min(dp[i-1][j],my_dp)); if(j >= i) { dp[i][j] = min(dp[i][j],a[s1.top()] + s2.top()); } } } cout << dp[k][n]; } /* 10 3 1 5 5 9 10 14 15 16 8 3 */

Compilation message (stderr)

blocks.cpp: In function 'int main()':
blocks.cpp:9:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d",&n,&k);
     ~~~~~^~~~~~~~~~~~~~~
blocks.cpp:13:14: 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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