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#include <cstdio> #include <cstring> #include <algorithm> #include <cstdlib> #include <string> #include <vector> using namespace std;
typedef long long LL; const int maxn = 10; const char s[] = " +-"; int a[maxn];
void dfs(int d, int n) { if (d == n) { int sum = 0, pre = 1; for (int i = 1; i < n; ++i) { if (a[i] == 1) { sum += pre; pre = i + 1; } else if (a[i] == 2) { sum += pre; pre = -i - 1; } else { pre *= 10; if (pre > 0) { pre += i + 1; } else { pre -= i + 1; } } } sum += pre; if (sum == 0) { putchar('1'); for (int i = 1; i < n; ++i) { printf("%c%d", s[a[i]], i + 1); } puts(""); } return; } for (int i = 0; i < 3; ++i) { a[d] = i; dfs(d + 1, n); } }
int main() { freopen("zerosum.in", "r", stdin); freopen("zerosum.out", "w", stdout); int n; scanf("%d", &n); dfs(1, n); return 0; }
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