Submission #37412

#	Submission time	Handle	Problem	Language	Result	Execution time	Memory
37412	2017-12-25T08:58:35 Z	HardNut	Bootfall (IZhO17_bootfall)	C++14	Compilation error	0 ms	0 KB

bootfall

#include<iostream>
#include<cstdio>
#include<algorithm>

using namespace std;

const int N = 1e5 + 5;

typedef long long ll;

int n, a[505], dp1[505][250005], dp2[505][250005], sum;
vector<int> ans, vec;#include<iostream>
#include<cstdio>
#include<algorithm>
#include<vector>

using namespace std;

const int N = 1e5 + 5;

typedef long long ll;

int n, a[505], dp1[105][10005], dp2[105][10005], sum;
vector<int> ans, vec;
int dp[105][10005];
bool us[105][10005];
bool used[10005];

bool is(int s, int v) {
    if (us[v][s])
        return dp[v][s];
    us[v][s] = 1;
    for (int i = 0; i <= s; i++) {
        if ((dp1[v - 1][i] && dp2[v + 1][s - i]) || (dp2[v + 1][i] && dp1[v - 1][s - i])) {
            dp[v][s] = 1;
            return 1;
        }
    }
    dp[v][s] = 0;
    return 0;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n;
    for (int i = 1; i <= n; i++) {
        dp[i][0] = 1;
        cin >> a[i];
        sum += a[i];
    }
    if (sum % 2 == 1) {
        cout << 0;
        return 0;
    }
    bool u = 0;
    dp1[0][0] = 1;
    for (int i = 1; i <= n; i++) {
        for (int j = 0; j <= sum; j++) {
            if (dp1[i - 1][j]) {
                if (j + a[i] == sum / 2)
                    u = 1;
                dp1[i][j + a[i]] = 1;
                dp1[i][j] = 1;
                dp[i][j + a[i]] = 1;
            }
        }
    }
    if (u == 0) {
        cout << 0;
        return 0;
    }
    dp2[n + 1][0] = 1;
    for (int i = n; i >= 1; i--) {
        for (int j = 0; j <= sum; j++) {
            if (dp2[i + 1][j]) {
                dp2[i][j + a[i]] = 1;
                dp2[i][j] = 1;
                dp[i][j + a[i]] = 1;
            }
        }
    }
    for (int i = 0; i <= sum; i++) {
        if (dp1[n - 1][i])
            vec.push_back(i);
    }
    for (int i : vec) {
        int x = abs(i - (sum - a[n] - i));
        bool u = 0;
        for (int j = 1; j <= n; j++) {
            if ((sum - a[j] + x) % 2) {
                u = 1;
                break;
            }
            if (!is((sum - a[j] + x) / 2, j)) {
                u = 1;
                break;
            }
        }
        if (!u) {
            if (!used[x]) {
                ans.push_back(x);
                used[x] = 1;
            }
        }
    }
    cout << ans.size() << "\n";
    for (int i = ans.size() - 1; i >= 0; i--)
        cout << ans[i] << " ";
}

int dp[505][250005];
bool us[505][250005];
bool used[250005];

bool is(int s, int v) {
    if (us[v][s])
        return dp[v][s];
    us[v][s] = 1;
    for (int i = 0; i <= s; i++) {
        if ((dp1[v - 1][i] && dp2[v + 1][s - i]) || (dp2[v + 1][i] && dp1[v - 1][s - i])) {
            dp[v][s] = 1;
            return 1;
        }
    }
    dp[v][s] = 0;
    return 0;
}

int main() {
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n;
    for (int i = 1; i <= n; i++) {
        dp[i][0] = 1;
        cin >> a[i];
        sum += a[i];
    }
    if (sum % 2 == 1) {
        cout << 0;
        return 0;
    }
    bool u = 0;
    dp1[0][0] = 1;
    for (int i = 1; i <= n; i++) {
        for (int j = 0; j <= sum; j++) {
            if (dp1[i - 1][j]) {
                if (j + a[i] == sum / 2)
                    u = 1;
                dp1[i][j + a[i]] = 1;
                dp1[i][j] = 1;
                dp[i][j + a[i]] = 1;
            }
        }
    }
    if (u == 0) {
        cout << 0;
        return 0;
    }
    dp2[n + 1][0] = 1;
    for (int i = n; i >= 1; i--) {
        for (int j = 0; j <= sum; j++) {
            if (dp2[i + 1][j]) {
                dp2[i][j + a[i]] = 1;
                dp2[i][j] = 1;
                dp[i][j + a[i]] = 1;
            }
        }
    }
    for (int i = 0; i <= sum; i++) {
        if (dp1[n - 1][i])
            vec.push_back(i);
    }
    for (int i : vec) {
        int x = abs(i - (sum - a[n] - i));
        bool u = 0;
        for (int j = 1; j <= n; j++) {
            if ((sum - a[j] + x) % 2) {
                u = 1;
                break;
            }
            if (!is((sum - a[j] + x) / 2, j)) {
                u = 1;
                break;
            }
        }
        if (!u) {
            if (!used[x]) {
                ans.push_back(x);
                used[x] = 1;
            }
        }
    }
    cout << ans.size() << "\n";
    for (int i = ans.size() - 1; i >= 0; i--)
        cout << ans[i] << " ";
}

Compilation message

bootfall.cpp:12:22: error: stray '#' in program
 vector<int> ans, vec;#include<iostream>
                      ^
bootfall.cpp:12:23: error: 'include' does not name a type
 vector<int> ans, vec;#include<iostream>
                       ^
bootfall.cpp:19:11: error: redefinition of 'const int N'
 const int N = 1e5 + 5;
           ^
bootfall.cpp:7:11: note: 'const int N' previously defined here
 const int N = 1e5 + 5;
           ^
bootfall.cpp:23:5: error: redefinition of 'int n'
 int n, a[505], dp1[105][10005], dp2[105][10005], sum;
     ^
bootfall.cpp:11:5: note: 'int n' previously declared here
 int n, a[505], dp1[505][250005], dp2[505][250005], sum;
     ^
bootfall.cpp:23:13: error: redefinition of 'int a [505]'
 int n, a[505], dp1[105][10005], dp2[105][10005], sum;
             ^
bootfall.cpp:11:8: note: 'int a [505]' previously declared here
 int n, a[505], dp1[505][250005], dp2[505][250005], sum;
        ^
bootfall.cpp:23:30: error: conflicting declaration 'int dp1 [105][10005]'
 int n, a[505], dp1[105][10005], dp2[105][10005], sum;
                              ^
bootfall.cpp:11:16: note: previous declaration as 'int dp1 [505][250005]'
 int n, a[505], dp1[505][250005], dp2[505][250005], sum;
                ^
bootfall.cpp:23:47: error: conflicting declaration 'int dp2 [105][10005]'
 int n, a[505], dp1[105][10005], dp2[105][10005], sum;
                                               ^
bootfall.cpp:11:34: note: previous declaration as 'int dp2 [505][250005]'
 int n, a[505], dp1[505][250005], dp2[505][250005], sum;
                                  ^
bootfall.cpp:23:50: error: redefinition of 'int sum'
 int n, a[505], dp1[105][10005], dp2[105][10005], sum;
                                                  ^
bootfall.cpp:11:52: note: 'int sum' previously declared here
 int n, a[505], dp1[505][250005], dp2[505][250005], sum;
                                                    ^
bootfall.cpp:24:13: error: redefinition of 'std::vector<int> ans'
 vector<int> ans, vec;
             ^
bootfall.cpp:12:13: note: 'std::vector<int> ans' previously declared here
 vector<int> ans, vec;#include<iostream>
             ^
bootfall.cpp:24:18: error: redefinition of 'std::vector<int> vec'
 vector<int> ans, vec;
                  ^
bootfall.cpp:12:18: note: 'std::vector<int> vec' previously declared here
 vector<int> ans, vec;#include<iostream>
                  ^
bootfall.cpp:112:19: error: conflicting declaration 'int dp [505][250005]'
 int dp[505][250005];
                   ^
bootfall.cpp:25:5: note: previous declaration as 'int dp [105][10005]'
 int dp[105][10005];
     ^
bootfall.cpp:113:20: error: conflicting declaration 'bool us [505][250005]'
 bool us[505][250005];
                    ^
bootfall.cpp:26:6: note: previous declaration as 'bool us [105][10005]'
 bool us[105][10005];
      ^
bootfall.cpp:114:17: error: conflicting declaration 'bool used [250005]'
 bool used[250005];
                 ^
bootfall.cpp:27:6: note: previous declaration as 'bool used [10005]'
 bool used[10005];
      ^
bootfall.cpp: In function 'bool is(int, int)':
bootfall.cpp:116:6: error: redefinition of 'bool is(int, int)'
 bool is(int s, int v) {
      ^
bootfall.cpp:29:6: note: 'bool is(int, int)' previously defined here
 bool is(int s, int v) {
      ^
bootfall.cpp: In function 'int main()':
bootfall.cpp:130:5: error: redefinition of 'int main()'
 int main() {
     ^
bootfall.cpp:43:5: note: 'int main()' previously defined here
 int main() {
     ^