Submission #36153

#TimeUTC-0UsernameProblemLanguageResultExecution timeMemory
361532017-12-06 04:42:29minhtung0404Bootfall (IZhO17_bootfall)C++14
100 / 100
453 ms4884 KiB
#include<bits/stdc++.h>
const int N = 505;
using namespace std;
vector <int> dp, f, ck;
int n, sum, a[N], cnt;
int main(){
scanf("%d", &n);
for (int i = 1; i <= n; i++) {scanf("%d", &a[i]); sum += a[i];}
dp.assign(sum+1, 0); dp[0] = 1; sum = 0;
for (int i = 1; i <= n; i++) {sum += a[i]; for (int j = sum; j >= 0; j--) if (j >= a[i]) dp[j] += dp[j-a[i]];}
if (sum % 2 == 1 || dp[sum/2] == 0){
printf("0"); return 0;
}
f.assign(sum+1, 0); ck.assign(sum+1, 0);
for (int num = 1; num <= n; num++) {
for (int i = 0; i <= sum; i++){
f[i] = dp[i];
if (i >= a[num]) f[i] -= f[i-a[num]];
if (f[i] != 0 && 2*i+a[num]-sum >= 0) ck[2*i+a[num]-sum]++;
}
}
for (int i = 0; i <= sum; i++) if (ck[i] == n) cnt++;
printf("%d\n", cnt);
for (int i = 0; i <= sum; i++) if (ck[i] == n) printf("%d ", i);
}
הההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההההה
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Compilation message (stderr)

bootfall.cpp: In function 'int main()':
bootfall.cpp:9:20: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &n);
                    ^
bootfall.cpp:10:53: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     for (int i = 1; i <= n; i++) {scanf("%d", &a[i]); sum += a[i];}
                                                     ^
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