제출 #630833

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
630833		TimDee	Catfish Farm (IOI22_fish)	C++17	18 / 100	90 ms	9300 KiB

fish

#include "fish.h"
#include <bits/stdc++.h>
using namespace std;
using ll = long long;


ll p2(int n, int m, vector<int> x, vector<int> y, vector<int> w) {

  vector<int> a(n,0), b(n,0);
  ll sum=0;
  for (int i=0; i<m; ++i) {
    if (x[i]==0) a[y[i]]=w[i];
    else b[y[i]]=w[i];
    sum+=w[i];
  }
  ll ans=0;
  for (int i=0; i<n; ++i) ans+=b[i];
  if (n==2) return max(ans,sum-ans);
  ll cnt=ans;
  for (int i=0; i<n; ++i) {
    cnt+=1ll*a[i]-1ll*b[i];
    ans=max(ans,cnt);
  }
  return ans;

}

ll p3(int n, int m, vector<int> x, vector<int> w) {

  vector<int> a(n,0);
  for (int i=0; i<m; ++i) a[x[i]]=w[i];
  vector<vector<ll>> dp(n+1,vector<ll>(2,0));
  dp[1]={a[1],0};
  //cout<<"#0 0 0\n#1 "<<dp[1][0]<<' '<<dp[1][1]<<'\n';
  for (int i=2; i<=n; ++i) {
    dp[i][0]=max({dp[i-2][1]+((i<n)?a[i]:0)+a[i-2],dp[i-2][0]+((i<n)?a[i]:0),dp[i-1][0]-a[i-1]+((i<n)?a[i]:0)});
    dp[i][1]=max(dp[i-1][0],dp[i-1][1]);
    //cout<<"#"<<i<<' '<<dp[i][0]<<' '<<dp[i][1]<<'\n';
  }

  return max(dp[n][0],dp[n][1]);

}

ll max_weights(int n, int m, vector<int> x, vector<int> y, vector<int> w) {

  int _p1=1, _p2=1, _p3=1;
  ll sum=0;
  for (int i=0; i<m; ++i) {
    _p1&=!(x[i]&1);
    _p2&=(x[i]<=1);
    _p3&=(y[i]==0);
    sum+=w[i];
  }

  if (_p1) return sum;
  if (_p2) return p2(n,m,x,y,w);
  if (_p3) return p3(n,m,x,w);

}

컴파일 시 표준 에러 (stderr) 메시지

fish.cpp: In function 'll max_weights(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
fish.cpp:60:1: warning: control reaches end of non-void function [-Wreturn-type]
   60 | }
      | ^

• Subtask 1: 3 / 3
• Subtask 2: 6 / 6
• Subtask 3: 9 / 9
• Subtask 4: 0 / 14
• Subtask 5: 0 / 21
• Subtask 6: 0 / 17
• Subtask 7: 0 / 14
• Subtask 8: 0 / 16