提出 #29682023

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ソースコード 拡げる

#include <bits/stdc++.h>
using namespace std;

#define rep(i, a, b) for(int i = (a); i < (b); ++i)
#define per(i, a, b) for(int i = (b)-1; i >= (a); --i)
#define all(x) begin(x), end(x)
#define sz(x) (int)(x).size()
#define pb push_back
#define eb emplace_back
#define mp make_pair
#define fst first
#define snd second

template<class T> bool ckmin(T& a, const T& b) { return b < a ? a = b, 1 : 0; }
template<class T> bool ckmax(T& a, const T& b) { return a < b ? a = b, 1 : 0; }

typedef long long ll;
typedef long double ld;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vi> vvi;
typedef vector<ll> vl;
typedef vector<vl> vvl;
typedef vector<pii> vii;

mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());

int main() {
  cin.tie(0)->sync_with_stdio(0);
  cin.exceptions(cin.failbit);

  ll n, k;
  cin >> n >> k;

  vi a(n);
  rep(i,0,n) cin >> a[i];

  ll x = 0;
  ll len = 0;

  int nxt = x % n;
  vi vis(n);
  vi rho;
  while (!vis[nxt]) {
    vis[nxt] = sz(rho);
    rho.pb(nxt);
    x += a[nxt];
    nxt = x % n;
  }

  int cstart = vis[nxt];
  ll csum = 0;
  int clen = 0;
  rep(i,cstart,sz(rho)) {
    csum += a[rho[i]];
    ++clen;
  }

  int early = sz(rho) - clen;
  ll rm = min((ll)early, k);
  k -= rm;
  ll ans = 0;
  rep(i,0,rm) ans += a[rho[i]];

  ll cycs = k / clen;
  k -= cycs * clen;
  ans += csum * cycs;
  rep(i,cstart,cstart+k) ans += a[rho[i]];
  cout << ans << '\n';
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘int main()’:
./Main.cpp:39:6: warning: unused variable ‘len’ [-Wunused-variable]
   39 |   ll len = 0;
      |      ^~~

ジャッジ結果