Submission #198806

#	Time	Username	Problem	Language	Result	Execution time	Memory
198806		imaxblue	Coins (BOI06_coins)	C++17	90 / 100	134 ms	380 KiB

coins

#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define mp make_pair
#define pb push_back
#define x first
#define y second
#define pii pair<int, int>
#define p3i pair<pii, int>
#define pll pair<ll, ll>
#define p3l pair<pll, ll>
#define vi vector<int>
#define vpii vector<pii>
#define vp3i vector<p3i>
#define vpll vector<pll>
#define vp3l vector<p3l>
#define lseg L, (L+R)/2, N*2+1
#define rseg (L+R)/2+1, R, N*2+2
#define ub upper_bound
#define lb lower_bound
#define pq priority_queue
#define MN 1000000007
#define fox(k, x) for (int k=0; k<x; ++k)
#define fox1(k, x) for (int k=1; k<=x; ++k)
#define foxr(k, x) for (int k=x-1; k>=0; --k)
#define fox1r(k, x) for (int k=x; k>0; --k)
#define ms multiset
#define flood(x) memset(x, 0x3f3f3f3f, sizeof x)
#define drain(x) memset(x, 0, sizeof x)
#define rng() ((rand() << 14)+rand())
#define scan(X) do{while((X=getchar())<'0'); for(X-='0'; '0'<=(_=getchar()); X=(X<<3)+(X<<1)+_-'0');}while(0)
char _;
#define pi 3.14159265358979323846
#define startrng mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int n, k, c, o, s, cnt;
vector<pii> v;
pii ans;
int32_t main(){
  ans = mp(0, -1);
  scanf("%i%i", &n, &k);
  fox(l, n){
    scanf("%i%i", &c, &o);
    o=1-o;
    if (c <= s){
      s-=v.back().x;
      cnt-=v.back().y;
      v.pop_back();

      s+=c;
      cnt+=o;
      v.pb(mp(c, o));
    } else {
      ans = max(ans, mp(cnt, -s));

      while(v.size() && v.back().y==0){
        s-=v.back().x;
        cnt-=v.back().y;
        v.pop_back();
      }

      s+=c;
      cnt+=o;
      if (s > k) break;
      v.pb(mp(c, o));
    }
    //cout << cnt << ' ' << s << endl;
  }
  if (s <= k){
    ans = max(ans, mp(cnt, -s));
  }
  cout << ans.x << endl << k+ans.y;
  return 0;
}
/*
7 25
1 0
2 0
3 1
5 0
10 0
13 0
20 0
*/

Compilation message (stderr)

coins.cpp: In function 'int32_t main()':
coins.cpp:41:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%i%i", &n, &k);
   ~~~~~^~~~~~~~~~~~~~~~
coins.cpp:43:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%i%i", &c, &o);
     ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 90 / 100