Submission #335719

#	Time	Username	Problem	Language	Result	Execution time	Memory
335719		shahriarkhan	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	632 ms	150328 KiB

joi2019_ho_t1

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

//type 0 -> orb
//type 1 -> ingot

const int maxN = 3e3 + 5 ;

long long dp[maxN][maxN][2] ;

int main()
{
    char s[maxN][maxN] ;
    int H , W ;
    long long ans = 0 ;
    scanf("%d%d",&H,&W) ;
    for(int i = 0 ; i < H ; ++i)
    {
        for(int j = 0 ; j < W ; ++j)
        {
            scanf(" %c",&s[i][j]) ;
        }
    }
    for(int i = H - 1 ; i >= 0 ; --i)
    {
        for(int j = W - 1 ; j >= 0 ; --j)
        {
            dp[i][j][0] = dp[i][j+1][0] ;
            dp[i][j][1] = dp[i+1][j][1] ;
            if(s[i][j]=='J') ans += (dp[i][j+1][0]*dp[i+1][j][1]) ;
            else if(s[i][j]=='O') ++dp[i][j][0] ;
            else ++dp[i][j][1] ;
        }
    }
    printf("%lld\n",ans) ;
    return 0 ;
}

Compilation message (stderr)

joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:16:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   16 |     scanf("%d%d",&H,&W) ;
      |     ~~~~~^~~~~~~~~~~~~~
joi2019_ho_t1.cpp:21:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   21 |             scanf(" %c",&s[i][j]) ;
      |             ~~~~~^~~~~~~~~~~~~~~~

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