Submission #391922

#	Time	Username	Problem	Language	Result	Execution time	Memory
391922		BartolM	Bootfall (IZhO17_bootfall)	C++17	44 / 100	1016 ms	1092 KiB

bootfall

#define DEBUG 1
#include <bits/stdc++.h>

using namespace std;

#define X first
#define Y second
#define mp make_pair
#define pb push_back
typedef long long ll;
typedef pair <int, int> pii;
typedef pair <int, pii> pip;
typedef pair <pii, int> ppi;
typedef pair <ll, ll> pll;

const int INF=0x3f3f3f3f;
const int N=505;

int n, uk=0;
int p[N], cnt[N*N];
vector <int> sol;
bitset <N*N> curr;

void resi(int ne) {
    curr.reset();
    curr.set(0);
    for (int i=0; i<n; ++i) {
        if (i==ne) continue;
        curr=curr | (curr<<p[i]);
    }
}

void solve() {
    resi(n);
    if (!curr[uk/2]) {
        printf("0\n");
        return;
    }
    for (int i=0; i<n; ++i) {
        resi(i);
        for (int j=0; j<=uk; ++j) {
            int br=p[i]+2*j-uk;
            if (br>=0 && br<=uk && curr[j]) cnt[br]++;
        }
    }
    for (int i=0; i<=uk; ++i) if (cnt[i]==n) sol.pb(i);
    printf("%d\n", sol.size());
    for (int x:sol) printf("%d ", x);
}

void load() {
    scanf("%d", &n);
    for (int i=0; i<n; ++i) scanf("%d", p+i);
    for (int i=0; i<n; ++i) uk+=p[i];
}

int main() {
    load();
    solve();
    return 0;
}

Compilation message (stderr)

bootfall.cpp: In function 'void solve()':
bootfall.cpp:47:14: warning: format '%d' expects argument of type 'int', but argument 2 has type 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wformat=]
   47 |     printf("%d\n", sol.size());
      |             ~^     ~~~~~~~~~~
      |              |             |
      |              int           std::vector<int>::size_type {aka long unsigned int}
      |             %ld
bootfall.cpp: In function 'void load()':
bootfall.cpp:52:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   52 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
bootfall.cpp:53:34: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   53 |     for (int i=0; i<n; ++i) scanf("%d", p+i);
      |                             ~~~~~^~~~~~~~~~~

• Subtask 1: 6 / 6
• Subtask 2: 7 / 7
• Subtask 3: 15 / 15
• Subtask 4: 16 / 16
• Subtask 5: 0 / 21
• Subtask 6: 0 / 35