Submission #1495961

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Source Code Expand

#include <bits/stdc++.h>
using namespace std;
#define FOR(i,a,b) for(int i=(a);i<(b);i++)
#define REP(i,n) FOR(i,0,n)
#define ALL(v) (v).begin(),(v).end()
#define fi first
#define se second
template<typename A, typename B> inline bool chmax(A &a, B b) { if (a<b) { a=b; return 1; } return 0; }
template<typename A, typename B> inline bool chmin(A &a, B b) { if (a>b) { a=b; return 1; } return 0; }
typedef long long ll;
typedef pair<int, int> pii;
typedef pair<ll, ll> pll;
typedef pair<int, pii> pip;
typedef pair<pll, pll> P;
const ll INF = 1ll<<29;
const ll MOD = 1000000007;
const double EPS = 1e-9;
const bool debug = 0;
//---------------------------------//

int N;
int a[1123456], rev[1123456];

int main() {
	cin >> N;
	REP(i, N) {
		scanf("%d", a + i);
		a[i]--;
		rev[a[i]] = i;
	}
	rev[N] = -1;
	
	string ans(N, '~');
	int now = 0;
	
	ans[a[0]] = 'A';
	FOR(i, 1, N) {
		int bn = rev[a[i - 1] + 1];
		int nn = rev[a[i] + 1];
		if (bn > nn) now++;
		if (now == 26) break;
		
		ans[a[i]] = now + 'A';
	}
	
	if (ans.find('~') != string::npos) puts("-1");
	else cout << ans << endl;
	
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:27:21: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d", a + i);
                     ^

Judge Result