Submission #1516393

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Source Code Expand

#include<bits/stdc++.h>
typedef long long ll;
typedef unsigned long long ull;
using namespace std;
#define pb push_back
int dy[]={0, 0, 1, -1, 1, 1, -1, -1};
int dx[]={1, -1, 0, 0, 1, -1, -1, 1};

#define FOR(i,a,b) for (int i=(a);i<(b);i++)
#define RFOR(i,a,b) for (int i=(b)-1;i>=(a);i--)
#define REP(i,n) for (int i=0;i<(n);i++)
#define RREP(i,n) for (int i=(n)-1;i>=0;i--)
#define mp make_pair
#define fi first
#define sc second
int n,x,w[32],m;
vector<int> sum;
void getsum(int i,int s){
    if(i == n){
        sum.pb(s);
        return;
    }

    getsum(i + 1,s);getsum(i + 1,s + w[i]);
}

int c = 0;

void cou(int i,int s){
    if(i == m){
        vector<int>::iterator it = lower_bound(sum.begin(),sum.end(),s);
        while(it != sum.end() && *it == s){
            it++;c++;
        }
        return;
    }
    cou(i + 1,s);cou(i + 1,s - w[i]);
}
int main(){
    scanf("%d%d",&n,&x);
    REP(i,n)
        scanf("%d",w + i);
    m = n / 2;
    getsum(m,0);
    sort(sum.begin(),sum.end());

    cou(0,x);
    printf("%d\n",c);
    return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:40:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d",&n,&x);
                        ^
./Main.cpp:42:26: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d",w + i);
                          ^

Judge Result