Educational #39C

暴力题

#include "iostream"
#include "iomanip"
#include "string.h"
#include "stack"
#include "queue"
#include "string"
#include "vector"
#include "set"
#include "map"
#include "algorithm"
#include "stdio.h"
#include "math.h"
#pragma comment(linker, "/STACK:102400000,102400000")
#define bug(x) cout<<x<<" "<<"UUUUU"<<endl;
#define mem(a,x) memset(a,x,sizeof(a))
#define step(x) fixed<< setprecision(x)<<
#define mp(x,y) make_pair(x,y)
#define pb(x) push_back(x)
#define ll long long
#define endl ("\n")
#define ft first
#define sd second
#define lrt (rt<<1)
#define rrt (rt<<1|1)
using namespace std;
const ll mod=1e9+7;
const ll INF = 1e18+1LL;
const int inf = 1e9+1e8;
const double PI=acos(-1.0);
const int N=1e5+100;
char s[N];
int n;
int main() {
    scanf("%s", s+1);
    n = strlen(s+1);
    char now = 'a';
    for(int i=1; i<=n; ++i) {
        if(s[i] <= now) s[i] = now++;
        if(now == 'z'+1) {
            for(int j=1; j<=n; ++j) {
                printf("%c", s[j]);
            }
            return 0;
        }
    }
    printf("-1");
    return 0;
}