Submission #555205

#	Time	Username	Problem	Language	Result	Execution time	Memory
555205		600Mihnea	Sightseeing in Kyoto (JOI22_kyoto)	C++17	10 / 100	2078 ms	4052 KiB

kyoto

#include <bits/stdc++.h>

bool home = 1;

using namespace std;

typedef long long ll;
const int N=(int)1e5+7;
const ll INF=(ll)1e18+7;
int n;
int m;
ll a[N];
ll b[N];

signed main() {
#ifdef ONLINE_JUDGE
  home = 0;
#endif
  home = 0;

  if (home) {
    freopen("I_am_iron_man", "r", stdin);
  }
  else {
    ios::sync_with_stdio(0); cin.tie(0);
  }

  cin>>n>>m;
  for (int i=1;i<=n;i++) cin>>a[i];
  for (int i=1;i<=m;i++) cin>>b[i];

  vector<ll> dp(m+1,INF);
  vector<ll> difs(m);

  for (int j=1;j<=m;j++){
    dp[j]=a[1]*(j-1);
  }
  difs[0]=-INF;
  for (int j=1;j<m;j++){
    difs[j]=a[1];
  }

  for (int i=2;i<=n;i++){
    for(int j=0;j<m;j++){
      assert(dp[j+1]-dp[j]==difs[j]);
    }
    ll s=0,s2=0;
    for(int j=1;j<=m;j++){
      s+=difs[j-1];
      dp[j]=min(s+INF+b[j],s2+INF+a[i]);
      difs[j-1]=dp[j]-dp[j-1];
      s2+=difs[j-1];
    }
  }
  cout<<dp[m]<<"\n";
}

Compilation message (stderr)

kyoto.cpp: In function 'int main()':
kyoto.cpp:22:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   22 |     freopen("I_am_iron_man", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 10 / 10
• Subtask 2: 0 / 30
• Subtask 3: 0 / 60