Submission #5027

#	Time	Username	Problem	Language	Result	Execution time	Memory
5027		ainta	Bank (IZhO14_bank)	C++98	100 / 100	180 ms	560 KiB

bank

#pragma warning(disable:4996)
#include<stdio.h>
#include<algorithm>
using namespace std;
int n, m, a[20], b[20], o[1010];
bool v[20];
bool DFS(int x, int C);
bool Do(int x, int S, int p, int C, int cnt){
	int i;
	if (!S){
		if (DFS(x + 1, C - cnt))return true;
		return false;
	}
	if (cnt == C - (n - x) * 2 + 2)return false;
	for (i = p; i < m; i++){
		if (!v[i] && S >= b[i]){
			v[i] = true;
			if (Do(x, S - b[i], i + 1, C, cnt + 1))return true;
			v[i] = false;
		}
	}
	return false;
}
bool DFS(int x, int C){
	if (x == n){
		return true;
	}
	if ((n - x) * 2 > C)return false;
	return Do(x, a[x], 0, C, 0);
}
int main(){
	int i, j;
	scanf("%d%d", &n, &m);
	int t;
	for (i = 0; i < n; i++){
		scanf("%d", &t);
		o[t]++;
	}
	for (i = 0; i < m; i++){
		scanf("%d", &t);
		o[t]--;
	}
	n = 0, m = 0;
	for (i = 1; i <= 1000; i++){
		if (o[i]){
			while (o[i] > 0)a[n++] = i, o[i]--;
			while (o[i] < 0)b[m++] = i, o[i]++;
		}
	}
	printf(DFS(0, m)?"YES" : "NO");
}

Compilation message (stderr)

bank.cpp:1:0: warning: ignoring #pragma warning  [-Wunknown-pragmas]
 #pragma warning(disable:4996)
 
bank.cpp: In function 'int main()':
bank.cpp:32:9: warning: unused variable 'j' [-Wunused-variable]
  int i, j;
         ^
bank.cpp:33:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &n, &m);
  ~~~~~^~~~~~~~~~~~~~~~
bank.cpp:36:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &t);
   ~~~~~^~~~~~~~~~
bank.cpp:40:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &t);
   ~~~~~^~~~~~~~~~

• Subtask 1: 19 / 19
• Subtask 2: 25 / 25
• Subtask 3: 27 / 27
• Subtask 4: 29 / 29