Submission #547267

#	Time	Username	Problem	Language	Result	Execution time	Memory
547267		zaneyu	Kemija (COCI22_kemija)	C++14	50 / 50	1 ms	324 KiB

Main

/*input
4
2H2O+2CO2->2H2CO3
H2SO4->H2O4
NH3+H2SO4->NH4SO4
CH4+2O2->CO2+2H2O
*/
#include<bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
typedef tree<long long,null_type,less_equal<long long>,rb_tree_tag,tree_order_statistics_node_update> indexed_set;
#pragma GCC optimize("O2")
//order_of_key #of elements less than x
// find_by_order kth element
using ll=long long;
using ld=long double;
using pii=pair<ll,ll>;
#define f first
#define s second
#define pb push_back
#define REP(i,n) for(int i=0;i<n;i++)
#define REP1(i,n) for(int i=1;i<=n;i++)
#define FILL(n,x) memset(n,x,sizeof(n))
#define ALL(_a) _a.begin(),_a.end()
#define sz(x) (int)x.size()
#define SORT_UNIQUE(c) (sort(c.begin(),c.end()),c.resize(distance(c.begin(),unique(c.begin(),c.end()))))
const ll maxn=4e5+5;
const ll maxlg=__lg(maxn)+2;
const ll INF64=4e18;
const int INF=0x3f3f3f3f;
const ll MOD=1e9+7;
const ld PI=acos(-1);
const ld eps=1e-6;
#define lowb(x) x&(-x)
#define MNTO(x,y) x=min(x,(__typeof__(x))y)
#define MXTO(x,y) x=max(x,(__typeof__(x))y)
template<typename T1,typename T2>
ostream& operator<<(ostream& out,pair<T1,T2> P){
    out<<P.f<<' '<<P.s;
    return out;
}
template<typename T>
ostream& operator<<(ostream& out,vector<T> V){
    REP(i,sz(V)) out<<V[i]<<((i!=sz(V)-1)?"\n":"");
    return out;
}
ll mult(ll a,ll b){
    return a*b%MOD;
}
ll mypow(ll a,ll b){
    a%=MOD;
    if(a==0) return 0;
    if(b<=0) return 1;
    ll res=1LL;
    while(b){
        if(b&1) res=(res*a)%MOD;
        a=(a*a)%MOD;
        b>>=1;
    }
    return res;
}
void solve(){
    string s;
    cin>>s;
    int p;
    REP(i,sz(s)){
        if(s[i]=='-'){
            p=i;
            break;
        }
    }
    map<char,int> mp;
    REP(i,p){
        int t=1;
        if(isdigit(s[i])) t=(s[i]-'0'),++i;
        while(i<p and s[i]!='+'){
            string x="";
            char z=s[i];
            int cur=1;
            if(i<sz(s)-1 and isdigit(s[i+1])) cur=s[i+1]-'0',++i;
            mp[z]+=t*cur;
            ++i;
        }
    }
    for(int i=p+2;i<sz(s);i++){
        int t=1;
        if(isdigit(s[i])) t=(s[i]-'0'),++i;
        while(i<sz(s) and s[i]!='+'){
            string x="";
            char z=s[i];
            int cur=1;
            if(i<sz(s)-1 and isdigit(s[i+1])) cur=s[i+1]-'0',++i;
            mp[z]-=t*cur;
            ++i;
        }
    }
    for(auto x:mp){
        if(x.s){
            cout<<"NE\n";
            return;
        }
    }
    cout<<"DA\n";
}
int32_t main(){
    ios::sync_with_stdio(false),cin.tie(0);
    int t;
    cin>>t;
    while(t--) solve();
}

Compilation message (stderr)

Main.cpp: In function 'void solve()':
Main.cpp:23:31: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized]
   23 | #define REP(i,n) for(int i=0;i<n;i++)
      |                               ^
Main.cpp:67:9: note: 'p' was declared here
   67 |     int p;
      |         ^

• Subtask 1: 10 / 10
• Subtask 2: 10 / 10
• Subtask 3: 30 / 30