Submission #483576

#	Time	Username	Problem	Language	Result	Execution time	Memory
483576		TLP39	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	397 ms	88700 KiB

joi2019_ho_t1

#include<bits/stdc++.h>
using namespace std;
 
int h,w;
 
char jewel[3010][3010];
int orbRight[3010][3010];
int ingotDown[3010][3010];
 
void getOrb()
{
  for(int i=0;i<h;i++)
  {
    orbRight[i][w-1] = 0;
    for(int j=w-1;j>=1;j--)
    {
      orbRight[i][j-1] = orbRight[i][j]+(jewel[i][j]=='O'? 1:0);
    }
  }
}
 
void getIngot()
{
  for(int i=0;i<w;i++) ingotDown[h-1][i] = 0;
  for(int i=h-1;i>=1;i--)
  {
    for(int j=0;j<w;j++)
    {
      ingotDown[i-1][j] = ingotDown[i][j]+(jewel[i][j]=='I'? 1:0);
    }
  }
}
 
long long int total()
{
  	long long int tot = 0;
	for(int i=0;i<h;i++)
    {
      for(int j=0;j<w;j++)
      {
        if(jewel[i][j]=='J') tot += 1ll * orbRight[i][j] * ingotDown[i][j];
      }
    }
  return tot;
}
 
int main()
{
  scanf("%d %d ",&h,&w);
  for(int i=0;i<h;i++)
  {
    for(int j=0;j<w;j++)
    {
      scanf("%c ",&jewel[i][j]);
    }
  }
  getOrb();
  getIngot();
  printf("%lld",total());
}

Compilation message (stderr)

joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:49:8: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   49 |   scanf("%d %d ",&h,&w);
      |   ~~~~~^~~~~~~~~~~~~~~~
joi2019_ho_t1.cpp:54:12: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   54 |       scanf("%c ",&jewel[i][j]);
      |       ~~~~~^~~~~~~~~~~~~~~~~~~~

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