Submission #1039227

#	Time	Username	Problem	Language	Result	Execution time	Memory
1039227		Maite_Morale	Catfish Farm (IOI22_fish)	C++17	9 / 100	109 ms	63088 KiB

fish

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define vll vector<ll>
#define pll pair<ll,ll>
#define vpll vector<pll>
#define S second
#define F first
long long max_weights(int n,int m,vector<int> X,vector<int> Y,vector<int> W) {
    vector<vll> v (n+5,vll {-1}), w(n+5,vll {0});
    vector<vpll> la (n+5,vpll {{-1,0}});
    ll r=0;
    for(int i=0;i<m;i++){
        if(X[i]>0)la[X[i]].push_back({Y[i],0});
        la[X[i]+1].push_back({Y[i],-W[i]});
        la[X[i]+1].push_back({Y[i]-1,0});
        la[X[i]+2].push_back({Y[i],0});
    }
    for(int i=0;i<=n;i++){
        sort(la[i].begin(),la[i].end());
        for(int j=1;j<la[i].size();j++){
            if(la[i][j].F==la[i][j-1].F)continue;
            v[i].push_back(la[i][j].F);
            w[i].push_back(-la[i][j].S);
            w[i][j]+=w[i][j-1];
        }
    }
    vll t1{{}},t2{{}},t3{{}},t4{{}};
    vll h2[2]={{},{}},h1[2]={{0},{0}};
    for(int i=1;i<=n;i++){
        t1=h1[0];
        for(int j=0;j<h1[0].size();j++){
            t1[j]=t1[j]-w[i-1][j];
            if(j>0)t1[j]=max(t1[j],t1[j-1]);
        }
        t2=h2[1];
        for(int j=0;j<h2[0].size();j++){
            if(j>0)t2[j]=max(t2[j],t2[j-1]);
        }
        t3=h2[1];ll p=v[i-1].size()-1;
        for(int j=h2[0].size()-1;j>=0;j--){
            while(p>=0 && v[i-1][p]>v[i-2][j])p--;
            if(p>-1)t3[j]=t3[j]+w[i-1][j];
            if(j+1<h2[0].size())t3[j]=max(t3[j],t3[j+1]);
        }
        t4=h1[1];p=v[i].size()-1;
        for(int j=h1[1].size()-1;j>=0;j--){
            while(p>=0 && v[i][p]>v[i-1][j])p--;
            t4[j]=t4[j]+w[i][p];
            if(j+1<h1[1].size())t4[j]=max(t4[j],t4[j+1]);
        }
        ll p1=-1,p2=-1;
        vll h[2]={{},{}};
        for(int j=0;j<v[i].size();j++){
            ll dp[2]={0,0};
            if(i>=2){
                while(p1+1<v[i-1].size() && v[i-1][p1+1]<=v[i][j])p1++;
                while(p2+1<v[i-2].size() && v[i-1][p2+1]<=v[i][j])p2++;
                if(p1>-1)             dp[0]=max(dp[0],t1[p1]+w[i-1][p1]);//dp[i-1][k][0]-co[i-1][k]+co[i-1][j]
                if(p2>-1)             dp[0]=max(dp[0],t2[p2]+w[i-1][p1]);//dp[i-2][k][1]           +co[i-1][j]   
                if(p2<v[i-2].size()-1)dp[0]=max(dp[0],t3[p2+1]);         //dp[i-2][k][1]+co[i-1][k] 
                dp[1]=dp[0];
                if(p1<v[i-1].size()-1)dp[1]=max(dp[1],t4[p2+1]-w[i][j]); //dp[i-1][k][1]+co [i] [k]-co[i][j]
            }
            h[0].push_back(dp[0]);
            h[1].push_back(dp[1]);
            r=max(h[0].back(),max(r,h[1].back()));
        }
        h2[0]=h1[0];h1[0]=h[0];
        h2[1]=h1[1];h1[1]=h[1];
    }
return r;
}

Compilation message (stderr)

fish.cpp: In function 'long long int max_weights(int, int, std::vector<int>, std::vector<int>, std::vector<int>)':
fish.cpp:21:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, long long int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |         for(int j=1;j<la[i].size();j++){
      |                     ~^~~~~~~~~~~~~
fish.cpp:32:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |         for(int j=0;j<h1[0].size();j++){
      |                     ~^~~~~~~~~~~~~
fish.cpp:37:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   37 |         for(int j=0;j<h2[0].size();j++){
      |                     ~^~~~~~~~~~~~~
fish.cpp:44:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |             if(j+1<h2[0].size())t3[j]=max(t3[j],t3[j+1]);
      |                ~~~^~~~~~~~~~~~~
fish.cpp:50:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   50 |             if(j+1<h1[1].size())t4[j]=max(t4[j],t4[j+1]);
      |                ~~~^~~~~~~~~~~~~
fish.cpp:54:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   54 |         for(int j=0;j<v[i].size();j++){
      |                     ~^~~~~~~~~~~~
fish.cpp:57:27: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   57 |                 while(p1+1<v[i-1].size() && v[i-1][p1+1]<=v[i][j])p1++;
      |                       ~~~~^~~~~~~~~~~~~~
fish.cpp:58:27: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   58 |                 while(p2+1<v[i-2].size() && v[i-1][p2+1]<=v[i][j])p2++;
      |                       ~~~~^~~~~~~~~~~~~~
fish.cpp:61:22: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   61 |                 if(p2<v[i-2].size()-1)dp[0]=max(dp[0],t3[p2+1]);         //dp[i-2][k][1]+co[i-1][k]
      |                    ~~^~~~~~~~~~~~~~~~
fish.cpp:63:22: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   63 |                 if(p1<v[i-1].size()-1)dp[1]=max(dp[1],t4[p2+1]-w[i][j]); //dp[i-1][k][1]+co [i] [k]-co[i][j]
      |                    ~~^~~~~~~~~~~~~~~~

• 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: 0 / 14
• Subtask 8: 0 / 16