Submission #300943

#	Time	Username	Problem	Language	Result	Execution time	Memory
300943		TMJN	Mechanical Doll (IOI18_doll)	C++17	0 / 100	7 ms	6860 KiB

doll

    #include "doll.h"
    #include <bits/stdc++.h>
    using namespace std;
     
    static vector<int>X,Y,K;
    static int c;
     
    int dfs(int num,int dep){
    	if(K.size()-1<num+(1<<dep)){
    		return K[num];
    	}
    	else{
    		int t=c;
    		c++;
    		X[t]=dfs(num,dep+1);
    		Y[t]=dfs(num+(1<<dep),dep+1);
    		return -t-1;
    	}
    }
     
    void create_circuit(int M,vector<int>A) {
    	X=Y=vector<int>(400000,0);
    	K=A;
    	c=0;
    	for(int i=0;;i++){
    		if((1<<i)>K.size()){
    			while((1<<i)>K.size()){
    				K.push_back(-c-1);
    				c++;
    			}
    			K.back()=0;
    			c--;
    			break;
    		}
    	}
    	int cc=c;
    	int tt=dfs(0,0);
    	for(int i=0;i<cc;i++){
    		X[i]=-i-1;
    		Y[i]=tt;
    	}
    	vector<int>C(M+1,tt);
    //	while(!X.empty()&&X.back()==0xE869120){
    //		X.pop_back();
    //		Y.pop_back();
    //	}
    vector<bool>B(400000,false);
	int p=0;
	vector<int>T;
	do{
		if(p>=0){
			if(p)T.push_back(p);
			p=C[p];
		}
		else{
			if(B[-p-1]){
				p=Y[-p-1];
			}
			else{
				p=X[-p-1];
			}
			B[-p-1]=!B[-p-1];
		}
	}while(p);
	assert(A==T);
	bool f=false;
	for(int i=0;i<400000;i++){
		f|=B[i];
	}
	assert(!f);
    	answer(C,X,Y);
    }

Compilation message (stderr)

doll.cpp: In function 'int dfs(int, int)':
doll.cpp:9:19: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
    9 |      if(K.size()-1<num+(1<<dep)){
      |         ~~~~~~~~~~^~~~~~~~~~~~~
doll.cpp: In function 'void create_circuit(int, std::vector<int>)':
doll.cpp:26:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |       if((1<<i)>K.size()){
      |          ~~~~~~^~~~~~~~~
doll.cpp:27:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   27 |        while((1<<i)>K.size()){
      |              ~~~~~~^~~~~~~~~

• Subtask 1: 0 / 2
• Subtask 2: 0 / 4
• Subtask 3: 0 / 10
• Subtask 4: 0 / 10
• Subtask 5: 0 / 18
• Subtask 6: 0 / 56