Submission #339694

#	Time	Username	Problem	Language	Result	Execution time	Memory
339694		Hazem	Grudanje (COCI19_grudanje)	C++14	70 / 70	229 ms	13832 KiB

grudanje

/*
ID: tmhazem1
LANG: C++14
TASK: pprime
*/

#include <bits/stdc++.h>
using namespace std;

#define S second
#define F first
#define LL long long
const int N = 2e5 + 10;


LL LINF = 100000000000000000;
LL INF = 1000000000;

vector<pair<int,int>>vec;
int n,q;
int freq[N][26],a[N];
string s;

bool ok(int mid){

    for(int i=1;i<=n;i++){
        char c = a[i]<=mid?'*':s[i-1];
        for(int j=0;j<26;j++)
            freq[i][j] = freq[i-1][j]+(c-'a'==j);
    }

    bool q = 1;
    for(auto x:vec)
        for(int i=0;i<26;i++)
            q &= freq[x.S][i]-freq[x.F-1][i]<=1;

    return q;
}

int main()
{
    //freopen("out.txt","w",stdout);
    cin>>s;
     n = s.size(),q;
    scanf("%d",&q);

    while(q--){
        int l,r;
        scanf("%d%d",&l,&r);
        vec.push_back({l,r});
    }

    for(int i=1;i<=n;i++){
        int x;cin>>x;
        a[x] = i;
    }

    int l = 0,r = n-1;
    while(l<r){
        int mid = (l+r)/2;
        if(ok(mid)) r = mid;
        else l = mid+1;
    }

    printf("%d\n",l);
}       

Compilation message (stderr)

grudanje.cpp: In function 'int main()':
grudanje.cpp:44:20: warning: right operand of comma operator has no effect [-Wunused-value]
   44 |      n = s.size(),q;
      |                    ^
grudanje.cpp:45:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   45 |     scanf("%d",&q);
      |     ~~~~~^~~~~~~~~
grudanje.cpp:49:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   49 |         scanf("%d%d",&l,&r);
      |         ~~~~~^~~~~~~~~~~~~~

• Subtask 1: 7 / 7
• Subtask 2: 7 / 7
• Subtask 3: 7 / 7
• Subtask 4: 7 / 7
• Subtask 5: 7 / 7
• Subtask 6: 7 / 7
• Subtask 7: 7 / 7
• Subtask 8: 7 / 7
• Subtask 9: 7 / 7
• Subtask 10: 7 / 7