Submission #626603

#	Time	Username	Problem	Language	Result	Execution time	Memory
626603		Kaitokid	Catfish Farm (IOI22_fish)	C++17	23 / 100	1092 ms	36312 KiB

fish

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
int mx;
ll dp[100009][3][2];
vector<int>g[100009],f[300009];
ll go(int x,int lst,int u)
{
    if(x==mx)return 0;
    if(dp[x][lst][u]!=-1)return dp[x][lst][u];
    for(int i=0;i<g[x].size();i++)
    {
        ll d=0;
        if((u==0) && g[x][i]>g[x-1][lst])
           {
                for(int j=0;j<g[x-1].size();j++)
                if(g[x-1][j]>=g[x-1][lst] && g[x-1][j]<g[x][i])d+=f[x-1][j];
           }
        dp[x][lst][u]=max(dp[x][lst][u],d+go(x+1,i,0));

        for(int j=0;j<g[x].size();j++)
                 if(g[x][j]<g[x-1][lst] && g[x][j]>=g[x][i])d+=f[x][j];


        dp[x][lst][u]=max(dp[x][lst][u],d+go(x+1,i,1));
    }
    return dp[x][lst][u];
}
ll max_weights(int N,int M,vector<int>X,vector<int>Y,vector<int>W)
{
    mx=N;
    for(int i=0;i<M;i++)
    {
        g[X[i]].push_back(Y[i]+1);
        f[X[i]].push_back(W[i]);
    }
    for(int i=0;i<N;i++)
    {
        g[i].push_back(N+1);f[i].push_back(0);
    }
    memset(dp,-1,sizeof dp);
    ll ans=0;
    for(int i=0;i<g[0].size();i++)
       ans=max(ans,go(1,i,0));
       return ans;
}

Compilation message (stderr)

fish.cpp: In function 'll go(int, int, int)':
fish.cpp:11:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |     for(int i=0;i<g[x].size();i++)
      |                 ~^~~~~~~~~~~~
fish.cpp:16:30: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   16 |                 for(int j=0;j<g[x-1].size();j++)
      |                             ~^~~~~~~~~~~~~~
fish.cpp:21:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |         for(int j=0;j<g[x].size();j++)
      |                     ~^~~~~~~~~~~~
fish.cpp: In function 'll max_weights(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
fish.cpp:43:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   43 |     for(int i=0;i<g[0].size();i++)
      |                 ~^~~~~~~~~~~~
fish.cpp:43:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   43 |     for(int i=0;i<g[0].size();i++)
      |     ^~~
fish.cpp:45:8: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   45 |        return ans;
      |        ^~~~~~

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