Submission #535930

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Source Code Expand

#include <cstdio>
#include <algorithm>
#include <stack>
#include <queue>
#include <deque>
#include <vector>
#include <string>
#include <string.h>
#include <cstdlib>
#include <ctime>
#include <cmath>
#include <map>
#include <set>
#include <iostream>
#include <sstream>
#include <numeric>
#include <cctype>
#define fi first
#define se second
#define rep(i,n) for(int i = 0; i < n; ++i)
#define rrep(i,n) for(int i = 1; i <= n; ++i)
#define drep(i,n) for(int i = n-1; i >= 0; --i)
#define gep(i,g,j) for(int i = g.head[j]; i != -1; i = g.e[i].next)
#define each(it,c) for(__typeof((c).begin()) it=(c).begin();it!=(c).end();it++)
#define rng(a) a.begin(),a.end()
#define maxs(x,y) x = max(x,y)
#define mins(x,y) x = min(x,y)
#define pb push_back
#define sz(x) (int)(x).size()
#define pcnt __builtin_popcount
#define snuke srand((unsigned)clock()+(unsigned)time(NULL));
#define df(x) int x = in()
using namespace std;
typedef long long int ll;
typedef pair<int,int> P;
typedef vector<int> vi;
typedef vector<vi> vvi;
inline int in() { int x; scanf("%d",&x); return x;}
inline void priv(vi a) { rep(i,sz(a)) printf("%d%c",a[i],i==sz(a)-1?'\n':' ');}

const int MX = 100005, INF = 1000010000;
const ll LINF = 1000000000000000000ll;
const double eps = 1e-10;



int main() {
  int n, a;
  scanf("%d%d",&n,&a);
  string s;
  cin >> s;
  vi t(n);
  rep(i,n) scanf("%d",&t[i]), t[i]--;
  --a;
  vi d;
  rep(i,n*3) {
    d.pb(a);
    a = t[a];
  }
  int c = 0;
  drep(i,sz(d)-1) {
    ++c;
    if (d[i] == d.back()) {
      break;
    }
  }
  int cs = (sz(d)-c)/c*c;
  int ans = -10;
  if (sz(s) <= 8) {
    int w = atoi(s.c_str());
    if (w < sz(d)) ans = d[w];
    else ans = d[cs+w%c];
  } else {
    int mod = 0;
    rep(i,sz(s)) {
      mod = (mod*10+(s[i]-'0'))%c;
    }
    ans = d[cs+mod];
  }
  cout<<ans+1<<endl;
  return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:49:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d",&n,&a);
                      ^
./Main.cpp:53:37: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   rep(i,n) scanf("%d",&t[i]), t[i]--;
                                     ^

Judge Result