Submission #809075

#	Time	Username	Problem	Language	Result	Execution time	Memory
809075		vjudge1	Bitaro the Brave (JOI19_ho_t1)	C++17	0 / 100	1 ms	468 KiB

joi2019_ho_t1

#include<bits/stdc++.h>
using namespace std;
int main()
{
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
	int h,w;
    cin >> h >> w;
    vector<int> J[h], O[h],I[w];
    for (int i = 0; i < h; i++)
    {
        string s;
        cin >> s;
        for (int j = 0; j < w; j++)
        {
            if (s[j] == 'J')
            {
                J[i].push_back(j);
            }
            else if (s[j] == 'O')
            {
                O[i].push_back(j);
            }
            else
            {
            	I[j].push_back(i);
            }
        }
    }
    for(int i=0;i<w;i++)
    {
    	sort(I[i].begin(),I[i].end());
	}
    int ans=0;
    for(int i=0;i<h;i++)
    {
    	for(int j=0;j<J[i].size();j++)
    	{
    		for(int l=0;l<O[i].size();l++)
    		{
    			if(O[i][l]>J[i][j])
    			{
    				int temp=I[J[i][j]].size();
    				int l=0,r=I[J[i][j]].size();
    				while(l<=r)
    				{
    					int m=(l+r)/2;
    					if(I[J[i][j]][m]>i)
    					{
    						temp=m;
    						r=m-1;
						}
						else
						{
							l=m+1;
						}
					}
					ans+=I[J[i][j]].size()-temp;
				}
			}
		}
	}
	cout<<ans;
    return 0;
}

Compilation message (stderr)

joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:36:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   36 |      for(int j=0;j<J[i].size();j++)
      |                  ~^~~~~~~~~~~~
joi2019_ho_t1.cpp:38:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   38 |       for(int l=0;l<O[i].size();l++)
      |                   ~^~~~~~~~~~~~

• Subtask 1: 0 / 20
• Subtask 2: 0 / 30
• Subtask 3: 0 / 50