Submission #973658

#	Time	Username	Problem	Language	Result	Execution time	Memory
973658		happy_node	Super Dango Maker (JOI22_dango3)	C++17	100 / 100	2189 ms	1172 KiB

dango3

#include "dango3.h"

#include <bits/stdc++.h>
using namespace std;

const int MX=400*25+5;

bool used[MX];

int N,M;

vector<vector<int>> groups; 

bool chk(int l, int r, int z) {
        for(int i=l;i<=r;i++) {
                for(auto x:groups[i]) used[x]=true;
        }
        used[z]=true;
        vector<int> qry;
        for(int j=1;j<=N*M;j++) {
                if(!used[j]) qry.push_back(j);
        }
        for(int i=l;i<=r;i++) {
                for(auto x:groups[i]) used[x]=false;
        }
        used[z]=false;
        int k=Query(qry);
        return k==M-(r-l+1);
}

int dnc(int l, int r, int z) {
        if(l==r) return l;
        int mid=(l+r)/2;
        if(chk(l,mid,z)) return dnc(l,mid,z);
        return dnc(mid+1,r,z);
}

void Solve(int NN, int MM) {
        N=NN, M=MM;

        groups.push_back({1});

        for(int i=2;i<=N*M;i++) {
                int res=dnc(0,groups.size(),i);

                if(res==groups.size()) {
                        groups.push_back({i});
                } else {
                        groups[res].push_back(i);
                }
        }

        for(auto v:groups) {
                Answer(v);
        }
}

Compilation message (stderr)

dango3.cpp: In function 'void Solve(int, int)':
dango3.cpp:46:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |                 if(res==groups.size()) {
      |                    ~~~^~~~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 5 / 5
• Subtask 3: 15 / 15
• Subtask 4: 78 / 78