제출 #423804

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
423804		tqbfjotld	카멜레온의 사랑 (JOI20_chameleon)	C++14	60 / 100	41 ms	456 KiB

chameleon

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

namespace {

int p[1005];
int inv[1005];
vector<int> adjl[1005];

int func(int num, vector<int> opts, int lim){
   // printf("%d??\n",opts.size());
    if (opts.size()==1){
        adjl[num].push_back(opts[0]);
        adjl[opts[0]].push_back(num);
        return 1;
    }
   // random_shuffle(opts.begin(),opts.end()); ///not needed?
    vector<int> lhalf, rhalf;
    for (int x = 0; x<opts.size(); x++){
        if (x<opts.size()/2){
            lhalf.push_back(opts[x]);
        }
        else{
            rhalf.push_back(opts[x]);
        }
    }
    int t = 0;
    lhalf.push_back(num);
    int res = Query(lhalf);
    if (res!=lhalf.size()){
        lhalf.pop_back();
        t += func(num,lhalf,lim);
    }
    if (t>=lim) return t;
    rhalf.push_back(num);
    if (rhalf.size()!=2){
        rhalf.pop_back();
        t+= func(num,rhalf,lim-t);
    }
    else if ( Query(rhalf)!=rhalf.size()){
      //  printf("queried twice\n");
        rhalf.pop_back();
        t+= func(num,rhalf,lim-t);
    }
    return t;
}

}

void Solve(int N) {
    if (N<=50){
        for (int x = 1; x<=2*N; x++){
            for (int y = x+1; y<=2*N; y++){
                int res = Query({x,y});
                if (res==1){
                    adjl[x].push_back(y);
                    adjl[y].push_back(x);
                }
            }
        }
    }
    else{
        vector<int> opt;
        for (int x = N+1; x<=2*N; x++){
            opt.push_back(x);
        }
        for (int x = 1; x<=N; x++){
            //int num = query_count;
            func(x,opt,1);
            vector<int> opt2;
            for (int y = adjl[x][0]+1; y<=2*N; y++){
                opt2.push_back(y);
            }
            if (opt2.size()>1){
                int res = func(x,opt2,1);
                opt2.clear();
                if (res==1 ){
                    for (int y = adjl[x][1]+1; y<=2*N; y++){
                        opt2.push_back(y);
                    }
                    if (opt2.size()>1){
                        func(x,opt2,1);
                    }
                    else if (opt2.size()==1){
                        adjl[x].push_back(opt2[0]);
                        adjl[opt2[0]].push_back(x);
                    }
                }
            }
          //  printf("queries taken %d\n",query_count-num);
        }
    }
  //  printf("cur query count = %d\n",query_count);
    for (int x = 1; x<=2*N; x++){
        if (adjl[x].size()==3){
            int res1 = Query({x,adjl[x][0],adjl[x][1]});
            int res2 = Query({x,adjl[x][1],adjl[x][2]});
            int res3 = Query({x,adjl[x][0],adjl[x][2]});
            if (res1==1){
                p[x] = adjl[x][2];
            }
            else if (res2==1){
                p[x] = adjl[x][0];
            }
            else{
                p[x] = adjl[x][1];
            }
            inv[p[x]] = x;
        }
    }
    for (int x = 1; x<=2*N; x++){
        if (adjl[x].size()<3){
            if (x<adjl[x][0]){
                Answer(x,adjl[x][0]);
            }
        }
        else{
            int other = -1;
            for (auto y : adjl[x]){
                if (y==p[x]) continue;
                if (y==inv[x]) continue;
                other = y;
            }
            if (x<other){
                Answer(x,other);
            }
        }
    }
}

컴파일 시 표준 에러 (stderr) 메시지

chameleon.cpp: In function 'int {anonymous}::func(int, std::vector<int>, int)':
chameleon.cpp:20:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   20 |     for (int x = 0; x<opts.size(); x++){
      |                     ~^~~~~~~~~~~~
chameleon.cpp:21:14: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |         if (x<opts.size()/2){
      |             ~^~~~~~~~~~~~~~
chameleon.cpp:31:12: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   31 |     if (res!=lhalf.size()){
      |         ~~~^~~~~~~~~~~~~~
chameleon.cpp:41:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   41 |     else if ( Query(rhalf)!=rhalf.size()){
      |               ~~~~~~~~~~~~^~~~~~~~~~~~~~
chameleon.cpp: In function 'void Solve(int)':
chameleon.cpp:99:17: warning: unused variable 'res3' [-Wunused-variable]
   99 |             int res3 = Query({x,adjl[x][0],adjl[x][2]});
      |                 ^~~~

• Subtask 1: 0 / 4
• Subtask 2: 20 / 20
• Subtask 3: 20 / 20
• Subtask 4: 20 / 20
• Subtask 5: 0 / 36