Submission #994057

---

Source Code Expand

#ifdef DEBUG
#define _GLIBCXX_DEBUG
#endif

#include <bits/stdc++.h>

using namespace std;

mt19937 mrand(random_device{} ()); 

int rnd(int x) {
  return mrand() % x;
}

typedef long double ld;
typedef long long ll;

#ifdef DEBUG
#define eprintf(...) fprintf(stderr, __VA_ARGS__), fflush(stderr)
#else
#define eprintf(...) ;
#endif

#define pb push_back
#define mp make_pair
#define sz(x) ((int) (x).size())
#define TASK "text"

const int inf = (int) 1.01e9;
const ld eps = 1e-9;
const ld pi = acos((ld) -1.0);

void precalc() {
}

int n, m;

const int maxn = (int) 2e5 + 10;
int a[maxn], qs[maxn];

int read() {
  if (scanf("%d", &n) < 1) {
    return 0;
  }
  for (int i = 0; i < n - 1; ++i) {
    scanf("%d", a + i);
  }
  scanf("%d", &m);
  for (int i = 0; i < m; ++i) {
    scanf("%d", qs + i);
  }
  return 1;
}

int sum[maxn];
int dp[maxn];

void solve() {
  sum[0] = 0;
  for (int i = 0; i < n; ++i) {
    sum[i + 1] = sum[i] + a[i];
  }

  for (int iter = 0; iter < m; ++iter) {
    a[n - 1] = qs[iter];
    sum[n] = sum[n - 1] + a[n - 1];

    dp[n - 2] = -a[n - 1];
    int cur = -inf;
    for (int i = n - 2; i >= 0; --i) {
      if (i < n - 2) {
        dp[i] = cur + sum[i + 1];
      }
      cur = max(cur, -dp[i] - sum[i + 1]);
    }
    printf("%d\n", dp[0] + a[0]);
  }
}

int main() {
  precalc();
#ifdef LOCAL
  freopen(TASK ".out", "w", stdout);
  assert(freopen(TASK ".in", "r", stdin));
#endif

  while (1) {
    if (!read()) {
      break;
    }
    solve();
#ifdef DEBUG
    eprintf("Time %.2f\n", (double) clock() / CLOCKS_PER_SEC);
#endif
  }
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int read()’:
./Main.cpp:46:23: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", a + i);
                       ^
./Main.cpp:48:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", &m);
                  ^
./Main.cpp:50:24: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", qs + i);
                        ^

Judge Result