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Submission #71704

# Submission time Handle Problem Language Result Execution time Memory
71704 2018-08-25T12:30:42 Z the_general(#2235, dbtlswkdrnss) Cross on the Grid (FXCUP3_cross) C++
22 / 100
 1000 ms 576 KB 
#include<stdio.h>
#define MOD 1000000007

int a(int);
int b(int);
int c(int);
int d(int);
int n;

int a(int x){
	if(x<3) return 0;
	if(x==3) return 1;
	return (c(x-2)+d(x-3)-b(x-3)+b(x-2)+d(x-3))%MOD;
}

int b(int x){
	if(x<3) return 0;
	if(x==3) return 1;
	return (c(x-2)+d(x-3)-a(x-3)+a(x-2)+d(x-3))%MOD;
}

int c(int x){
	if(x<3) return 0;
	if(x==3) return 1;
	return (a(x-2)+b(x-2)+d(x-3))%MOD;
}

int d(int x){
	if(x==1 || x==2) return 1;
	return ((a(x)+b(x))%MOD+c(x)+d(x-1))%MOD;
}

int main(){
	scanf("%d", &n);
	printf("%d", (d(n))%MOD);
}

Compilation message

cross.cpp: In function 'int main()':
cross.cpp:34:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d", &n);
  ~~~~~^~~~~~~~~~

Subtask #1
22.0 / 22.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 248 KB Output is correct
2 Correct 3 ms 356 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 2 ms 432 KB Output is correct
5 Correct 3 ms 508 KB Output is correct
6 Correct 2 ms 508 KB Output is correct
7 Correct 2 ms 576 KB Output is correct
8 Correct 3 ms 576 KB Output is correct

Subtask #2
0 / 35.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 248 KB Output is correct
2 Correct 3 ms 356 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 2 ms 432 KB Output is correct
5 Correct 3 ms 508 KB Output is correct
6 Correct 2 ms 508 KB Output is correct
7 Correct 2 ms 576 KB Output is correct
8 Correct 3 ms 576 KB Output is correct
9 Correct 2 ms 576 KB Output is correct
10 Execution timed out 1073 ms 576 KB Time limit exceeded
11 Halted 0 ms 0 KB -

Subtask #3
0 / 43.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 248 KB Output is correct
2 Correct 3 ms 356 KB Output is correct
3 Correct 2 ms 432 KB Output is correct
4 Correct 2 ms 432 KB Output is correct
5 Correct 3 ms 508 KB Output is correct
6 Correct 2 ms 508 KB Output is correct
7 Correct 2 ms 576 KB Output is correct
8 Correct 3 ms 576 KB Output is correct
9 Correct 2 ms 576 KB Output is correct
10 Execution timed out 1073 ms 576 KB Time limit exceeded
11 Halted 0 ms 0 KB -