Submission #116593

#	Time	Username	Problem	Language	Result	Execution time	Memory
116593		JohnTitor	Match (CEOI16_match)	C++11	0 / 100	2 ms	384 KiB

match

#include <bits/stdc++.h>
using namespace std;
#define FOR(i, j, k) for(int i=(j); i<=(k); i++)
#define FFOR(i, j, k) for(int i=(j); i<(k); i++)
#define DFOR(i, j, k) for(int i=(j); i>=(k); i--)
#define bug(x) cerr<<#x<<" = "<<(x)<<'\n'
#define pb push_back
#define mp make_pair
#define bit(s, i) (((s)>>(i))&1LL)
#define mask(i) ((1LL<<(i)))
#define builtin_popcount __builtin_popcountll
#define __builtin_popcount __builtin_popcountll
using ll=long long; using ld=long double;
mt19937_64 rng(chrono::high_resolution_clock::now().time_since_epoch().count()); const ld pi=acos(0)*2;
template <typename T> inline void read(T &x){char c; bool nega=0; while((!isdigit(c=getchar()))&&(c!='-')); if(c=='-'){nega=1; c=getchar();} x=c-48; while(isdigit(c=getchar())) x=x*10+c-48; if(nega) x=-x;}
template <typename T> inline void writep(T x){if(x>9) writep(x/10); putchar(x%10+48);}
template <typename T> inline void write(T x){if(x<0){ putchar('-'); x=-x;} writep(x);}
template <typename T> inline void writeln(T x){write(x); putchar('\n');}
#define taskname "Match"
string s;
int cnt[256];
string t;
vector <char> v;
int main(){
    #ifdef Aria
        if(fopen(taskname".in", "r"))
            freopen(taskname".in", "r", stdin);
    #endif // Aria
    cin>>s;
    for(char c: s) cnt[c]++;
    FOR(c, 'a', 'z') if(cnt[c]%2){
        puts("-1");
        return 0;
    }
    for(char c: s){
        if(v.empty()||(v.back()!=c)||cnt[c]){
            v.pb(c);
            t+='(';
            cnt[c]-=2;
            if(cnt[c]<0){
                puts("-1");
                return 0;
            }
        }
        else{
            v.pop_back();
            t+=')';
        }
    }
    cout<<t<<'\n';
}

Compilation message (stderr)

match.cpp: In function 'int main()':
match.cpp:30:25: warning: array subscript has type 'char' [-Wchar-subscripts]
     for(char c: s) cnt[c]++;
                         ^
match.cpp:36:43: warning: array subscript has type 'char' [-Wchar-subscripts]
         if(v.empty()||(v.back()!=c)||cnt[c]){
                                           ^
match.cpp:39:18: warning: array subscript has type 'char' [-Wchar-subscripts]
             cnt[c]-=2;
                  ^
match.cpp:40:21: warning: array subscript has type 'char' [-Wchar-subscripts]
             if(cnt[c]<0){
                     ^

• Subtask 1: 0 / 10
• Subtask 2: 0 / 27
• Subtask 3: 0 / 63