Submission #347526

#	Time	Username	Problem	Language	Result	Execution time	Memory
347526		jazzup	Bitaro the Brave (JOI19_ho_t1)	C++14	100 / 100	292 ms	53356 KiB

joi2019_ho_t1

#include<cstdio>

using namespace std;

char a[3001][3001];
int dp[3001][3001];

int main(){
	int h,w;
	scanf("%d%d",&h,&w);
	for(int i=0;i<h;i++){
		scanf("%s",a[i]);
	}

	int cnt;

	for(int i=h-1;i>=0;i--){
		cnt=0;
		for(int j=w-1;j>=0;j--){
			if(a[i][j]=='O')cnt++;
			else if(a[i][j]=='J')dp[i][j]=cnt;
			// printf("%d ",cnt);
		}
	}

	long long sum=0;

	for(int i=w-1;i>=0;i--){
		cnt=0;
		for(int j=h-1;j>=0;j--){
			if(a[j][i]=='I')cnt++;
			else if(a[j][i]=='J'){
				dp[j][i]*=cnt;
				sum+=dp[j][i];
			}
		}
	}

	printf("%lld\n",sum);
	// for(int i=0;i<h;i++){
	// 	for(int j=0;j<w;j++)
	// 		printf("%d ",dp[i][j]);
	// 	printf("\n");
	// }

	return 0;
}

Compilation message (stderr)

joi2019_ho_t1.cpp: In function 'int main()':
joi2019_ho_t1.cpp:11:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   11 |  scanf("%d%d",&h,&w);
      |  ~~~~~^~~~~~~~~~~~~~
joi2019_ho_t1.cpp:13:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   13 |   scanf("%s",a[i]);
      |   ~~~~~^~~~~~~~~~~

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