Submission #1111276

#	Time	Username	Problem	Language	Result	Execution time	Memory
1111276		huyngodzz	Martian DNA (BOI18_dna)	C++14	68 / 100	66 ms	14472 KiB

dna

    ///huynhocute123///
#include<bits/stdc++.h>
using namespace std;
#define S second
#define F first
#define pii pair<int,int>
#define piii pair<int,pair<int,int>>
#define pb push_back
#define FOR(i, a, b) for(int i = a; i <= b; ++i)
#define REP(i, a, b) for(int i = b; i >= a; --i)
#define ALL(v) v.begin(),v.end()
#define inp(name) if(fopen(name, "r")) freopen(name, "r", stdin);
#define out(name) if(fopen(name, "w")) freopen(name, "w", stdout);
//random_device rd;
//mt19937 rng(rd());
//#pragma GCC optimize ("O3")
//#pragma GCC optimize ("unroll-loops")
//#pragma GCC target("popcnt")
//#define int long long
const int maxN = 2 * 1e5 + 9 ;
const int  modd = 1e9 + 7;
const int base = 2309;
const int MAX = 1e9+9;
const double pi = 3.14159265358979323846;
const double rad = 3.14159265358979323846 /180;
void minimize(int &u, int v){
    if(v < u) u = v;
}
void maximize(int &u, int v){
    if(v > u) u = v;
}
int n, k, t, m, res, a[maxN], ori[maxN],f[15][maxN];
int l, r;
pii q[maxN];
bool vis[maxN];
vector<int> e[maxN];
void compress(){
    vector<int > tmp;
    FOR(i, 1, k)tmp.pb(q[i].F);
    sort(ALL(tmp));
    FOR(i, 1, k){
        ori[i] = q[i].F;
        q[i].F = lower_bound(ALL(tmp), q[i].F) -tmp.begin() +1;

    }
}
bool check(int st, int en){
    FOR(i, 1, k){
        if(f[q[i].F][en] - f[q[i].F][st-1] < q[i].S)return 0;
    }
    return 1;
}
pii get(int st){
    FOR(i, 1, k){
        if(f[q[i].F][n] - f[q[i].F][st-1] < q[i].S)return {0, 0};
    }
    l = st;
    r = n;
    while(l <= r){
        int mid = (l +r)/2;
        if(check(st, mid))r =mid -1;
        else l =mid + 1;
    }
    return {1, l};
}


void solve(){
    cin >> n >> k >> k;
    FOR(i, 1, n)cin >> a[i];
    FOR(i, 1, k)cin >>q[i].F >> q[i].S;
    compress();
    FOR(i, 1, n){
        FOR(j, 1, k){
            f[q[j].F][i]+= f[q[j].F ][i-1];
        }
        FOR(j, 1, k){
            if(ori[j] == a[i]){
                    f[q[j].F][i]++;
                    break;
            }
        }

    }
    res = MAX;
    FOR(i, 1, n){
        pii ans = get(i);
        if(ans.F == 0)break;
        minimize(res, ans.S - i +1);
//        cout << i << " " << ans.S << '\n';
    }
    if(res == MAX)cout << "impossible";
    else cout << res;
//    cout << q[2].F;
//    cout << f[q[1].F][n];

}
signed main(){
//    freopen("name.inp","r",stdin);
//    freopen("name.out","w",stdout);
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    inp("task.inp");
    int tc = 1;
   // cin >> tc;
    while( tc-- )solve();
    cerr << '\n' << "Time elapsed: " << (1.0 * clock() / CLOCKS_PER_SEC) << " s\n" ;


}

Compilation message (stderr)

dna.cpp: In function 'int main()':
dna.cpp:12:47: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   12 | #define inp(name) if(fopen(name, "r")) freopen(name, "r", stdin);
      |                                        ~~~~~~~^~~~~~~~~~~~~~~~~~
dna.cpp:103:5: note: in expansion of macro 'inp'
  103 |     inp("task.inp");
      |     ^~~

• Subtask 1: 16 / 16
• Subtask 2: 24 / 24
• Subtask 3: 28 / 28
• Subtask 4: 0 / 32