Submission #3665225

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Source Code Expand

#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vl;
typedef pair<int,int> pii;
typedef pair<ll,ll> pll;

typedef int _loop_int;
#define REP(i,n) for(_loop_int i=0;i<(_loop_int)(n);++i)
#define FOR(i,a,b) for(_loop_int i=(_loop_int)(a);i<(_loop_int)(b);++i)
#define FORR(i,a,b) for(_loop_int i=(_loop_int)(b)-1;i>=(_loop_int)(a);--i)

#define DEBUG(x) cout<<#x<<": "<<x<<endl
#define DEBUG_VEC(v) cout<<#v<<":";REP(i,v.size())cout<<" "<<v[i];cout<<endl
#define ALL(a) (a).begin(),(a).end()

#define CHMIN(a,b) a=min((a),(b))
#define CHMAX(a,b) a=max((a),(b))

// mod
const ll MOD = 1000000007ll;
#define FIX(a) ((a)%MOD+MOD)%MOD

// floating
typedef double Real;
const Real EPS = 1e-11;
#define EQ0(x) (abs(x)<EPS)
#define EQ(a,b) (abs(a-b)<EPS)
typedef complex<Real> P;

int n;
ll a[1252];
ll s[1252];

// bool win[2][1252][2521];
int win[2][1252];
const int C = 1252;

int main(){
  scanf("%d",&n);
  REP(i,n)scanf("%lld",a+i);
  REP(i,n)s[i+1] = s[i]+a[i];
  ll low = -1e16, high = 1e16;
  while(low+1<high){
    ll x = (low+high)/2;
    // answer is leq than x?

    // init
    // REP(i,2)REP(j,n+1)REP(kl,2521)win[i][j][kl]=false;
    REP(i,2)REP(j,n+1)win[i][j] = i==0 ? -1e9 : 1e9;
    // term
    win[0][n] = 0;  // upper bound
    win[1][n] = 1;  // lower bound
    // REP(i,2)REP(kl,2521){
    //   win[i][n][kl] = (i==0) ^ (kl-C<=0) ^ 1;
    // }
    FORR(j,0,n)FOR(a,1,n-j+1){
      int add = s[j+a]-s[j]<=x ? 1 : -1;
      // i==0 Alice
      CHMAX(win[0][j], win[1][j+a]-add-1);
      // i==1 Bob
      CHMIN(win[1][j], win[0][j+a]-add+1);
      // REP(i,2)FOR(kl,1,2521-1){
      //   win[i][j][kl] = win[i][j][kl] || !win[i^1][j+a][kl+add];
      // }
    }
    // if(win[0][0][C]){
    if(win[0][0] >= 0){
      low = x;
    }else{
      high = x;
    }
  }
  printf("%lld\n",high);
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:43:17: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d",&n);
                 ^
./Main.cpp:44:28: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   REP(i,n)scanf("%lld",a+i);
                            ^

Judge Result