Language: C++

#include<iostream>
#include<vector>
#include<algorithm>
#include<cstdlib>
using namespace std;
#define INF 1e6

static const int seeds=630;
static const int D=365;
static const int ntype=26;
static const int population_size=50;
int gene[population_size][D+1];
int next_gene[population_size][D+1];
static int elete[D+1];
static int elete_score=-INF;
static const int init_n_greedyGene=1;
static const double crossRate=0.5;
static const double mutationRate=0.5;
vector<pair<long double,int>> cumfreq;

class Contest{
public:
    Contest(){
        last=0;
    }
    int s[D+1];
    int c;
    int last;
};

Contest contest[ntype+1];

void Input(){
    int d;
    cin>>d;
    for(int i=1;i<=ntype;++i){
        int t;
        cin>>t;
        contest[i].c=t;
    }
    for(int day=1;day<=D;++day){
        for(int type=1;type<=ntype;++type){
            int t;
            cin>>t;
            contest[type].s[day]=t;
        }
    }
}

void randGene(int p){
    for(int day=1;day<=D;++day){
        gene[p][day]=rand()%ntype+1;
    }
}


void greedyGene(int p){
    vector<int> l(ntype+1,0);
    int score=0;
    for(int d=1;d<=D;++d){
        for(int i=1;i<=ntype;++i) score-=contest[i].c*(d-l[i]);
        int temp=score;
        int t=-1;
        for(int i=1;i<=ntype;++i){
            int k=contest[i].s[d]+contest[i].c*(d-l[i])+score;
            if(k>temp){
                temp=k;
                t=i;
            }
        }
        gene[p][d]=t;
        l[t]=d;
        score+=temp;
    }
    /*
    cout<<endl<<"elete"<<endl;
    for(int d=1;d<=D;++d) cout<<elete[d]<<endl;

    cout<<endl<<"greedy"<<endl;
    for(int d=1;d<=D;++d) cout<<gene[p][d]<<endl;
    */
}

int evaluate(int i){
    int v[D+1];
    v[0]=0;
    for(int day=1;day<=D;++day){
        v[day]=0;
        int type=gene[i][day];
        v[day]+=contest[type].s[day];
        contest[type].last=day;
        for(int t=1;t<=ntype;++t){
            v[day]-=contest[t].c*(day-contest[t].last);
        }
        v[day]+=v[day-1];
    }
    return v[D];   
}

void calcCumFreq(){
    double sum=0;
    int n=cumfreq.size()
    int last_n=n-1;
    --last_n;
    sort(cumfreq.begin(),cumfreq.end());
    //change elete
    /*
    cout<<endl<<"Gene"<<endl<<endl;
    for(int i=0;i<cumfreq.size();++i) cout<<cumfreq[i].first<<endl;
    */
    if(elete_score<cumfreq[last_n].first){
        elete_score=cumfreq[last_n].first;
        //cout<<elete_score<<endl;
        for(int d=1;d<=D;++d){
            elete[d]=gene[cumfreq[last_n].second][d];
            //cout<<elete[d]<<endl;
        }
    }
    for(int i=0;i<n;++i){
        sum+=cumfreq[i].first;
    }
    for(int i=0;i<n;++i){
        cumfreq[i].first/=sum;
    }
    for(int i=0;i<n-1;++i){
        cumfreq[i+1].first+=cumfreq[i].first;
    }
}

void CrossOver(int gene_i, int ci, int cj){
    int l=rand()%D+1;
    int r=rand()%D+1;
    while(r==l){
        l=rand()%D+1;
        r=rand()%D+1;
    }
    if(r<l) swap(r,l);
    for(int d=1;d<l;++d) next_gene[gene_i][d]=gene[ci][d];
    for(int d=l;d<=r;++d) next_gene[gene_i][d]=gene[cj][d];
    for(int d=r+1;d<=D;++d) next_gene[gene_i][d]=gene[ci][d];
}

void Mutation(int ngene_i){
    int n=rand()%3+1;
    for(int i=0;i<n;++i){
        int p=rand()%D+1;
        next_gene[ngene_i][p]=rand()%ntype+1;
    }
}

int Select(){
    double a=(double)rand()/RAND_MAX;
    int t=cumfreq.size()-1;
    for(int i=0;i<t;++i){
        if(cumfreq[i+1].first>a) return cumfreq[i].second;
    }
    return cumfreq[t].second;
}

//init
void Init(int nGreedy){
    for(int i=0;i<nGreedy;++i) greedyGene(i);
    for(int i=nGreedy;i<population_size;++i) randGene(i);
}

void makeCumFreq(){
    for(int i=0;i<population_size;++i){
        int e=evaluate(i);
        //cout<<e<<endl;
        cumfreq.push_back(make_pair(e,i));
    }
    calcCumFreq();
}

void makeNextGeneration(){
    for(int d=0;d<=D;++d) next_gene[0][d]=elete[d]; 
    for(int i=1;i<population_size;++i){
        int pi=Select();
        double crossrand=(double)rand()/RAND_MAX;
        if(crossrand<crossRate){
            int pj=Select();
            CrossOver(i,pi,pj);
        }
        else{
            for(int j=1;j<=D;++j) next_gene[i][j]=gene[pi][j];
        }
        double murand=(double)rand()/RAND_MAX;
        if(murand<mutationRate){
            Mutation(i);
        }
    }
    for(int i=0;i<50;++i){
        for(int j=1;j<=D;++j){
            gene[i][j]=next_gene[i][j];
        }
    }
}

void GA(int n){
    for(int i=0;i<n;++i){
        makeCumFreq();
        makeNextGeneration();
        cumfreq.resize(0);
    }    
}

void Output(){
    for(int d=1;d<=D;++d) cout<<elete[d]<<endl;
}

int main(){
    srand(seeds);
    Input();
    Init(init_n_greedyGene);
    GA(4000);
    Output();
} 


Compiler output:
a.cc: In function 'void calcCumFreq()':
a.cc:103:5: error: expected ',' or ';' before 'int'
  103 |     int last_n=n-1;
      |     ^~~
a.cc:104:7: error: 'last_n' was not declared in this scope
  104 |     --last_n;
      |       ^~~~~~