Submission #301253

#	Time	Username	Problem	Language	Result	Execution time	Memory
301253		phillip	Coins (IOI17_coins)	C++14	25 / 100	11 ms	1788 KiB

coins

#include "coins.h"
#include <bits/stdc++.h>
#define ll long long
using namespace std;
int dif(string s1,string s2)
{
    int dd=0;
    for(int i=0;i<3;i++)if(s1[i]!=s2[i])dd++;
    return dd;
}
vector<int> coin_flips(vector<int> b, int c)
{
    string ac[4]={"000","111","101","010"};
    vector<int> flips;
    string s="";
    for(int i=0;i<3;i++)s+=char(b[i]+'0');
    int cur=0;
    if(c<2)
    {
        if(c>0)cur+=2;
        string s1=ac[cur],s2=ac[cur+1];
        if(s==s1||s==s2)
        {
            flips.push_back(9);
            return flips;
        }
        string comp;
        if(dif(s,s1)==1)comp=s1;
        else comp=s2;
        for(int i=0;i<3;i++)
        {
            if(s[i]!=comp[i])flips.push_back(i);
        }
        return flips;
    }
    vector<int>v;
    if(s==ac[0]||s==ac[1]||s==ac[2]||s==ac[3])v.push_back(2);
    else v.push_back(9);
    return v;
}
int find_coin(vector<int> b)
{
    int ret=0;
    string ac[4]={"000","111","101","010"};
    string s="";
    for(int i=0;i<3;i++)s+=char(b[i]+'0');
    if(s==ac[0]||s==ac[1])return 0;
    else if(s==ac[2]||s==ac[3])return 1;
    return 2;
}
/*111111
11111111
11111111
11111111
11111111
11111111
11111111
11111111
*/

Compilation message (stderr)

coins.cpp: In function 'int find_coin(std::vector<int>)':
coins.cpp:43:9: warning: unused variable 'ret' [-Wunused-variable]
   43 |     int ret=0;
      |         ^~~

• Subtask 1: 10 / 10
• Subtask 2: 15 / 15
• Subtask 3: 0 / 10
• Subtask 4: 0 / 15
• Subtask 5: 0 / 50