Submission #199585

#	Time	Username	Problem	Language	Result	Execution time	Memory
199585		SamAnd	Grudanje (COCI19_grudanje)	C++17	70 / 70	191 ms	13944 KiB

grudanje

#include <bits/stdc++.h>
using namespace std;
const int N = 100005;

int n;
char a[N], aa[N];
int q;
int l[N], r[N];
int u[N];

int p[N][26];
bool stg(int x)
{
    for (int i = 1; i <= n; ++i)
        a[i] = aa[i - 1];
    for (int i = 1; i <= x; ++i)
        a[u[i]] = 0;
    for (int i = 1; i <= n; ++i)
    {
        for (int j = 0; j < 26; ++j)
            p[i][j] = p[i - 1][j];
        if (a[i])
            ++p[i][a[i] - 'a'];
    }
    for (int i = 1; i <= q; ++i)
    {
        for (int j = 0; j < 26; ++j)
        {
            if (p[r[i]][j] - p[l[i] - 1][j] > 1)
                return false;
        }
    }
    return true;
}

int main()
{
    scanf(" %s", aa);
    n = strlen(aa);
    scanf("%d", &q);
    for (int i = 1; i <= q; ++i)
    {
        scanf("%d%d", &l[i], &r[i]);
    }
    for (int i = 1; i <= n; ++i)
        scanf("%d", &u[i]);
    int l = 0, r = n;
    int ans;
    while (l <= r)
    {
        int m = (l + r) / 2;
        if (stg(m))
        {
            ans = m;
            r = m - 1;
        }
        else
            l = m + 1;
    }
    printf("%d\n", ans);
    return 0;
}

Compilation message (stderr)

grudanje.cpp: In function 'int main()':
grudanje.cpp:38:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf(" %s", aa);
     ~~~~~^~~~~~~~~~~
grudanje.cpp:40:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &q);
     ~~~~~^~~~~~~~~~
grudanje.cpp:43:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d%d", &l[i], &r[i]);
         ~~~~~^~~~~~~~~~~~~~~~~~~~~~
grudanje.cpp:46:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%d", &u[i]);
         ~~~~~^~~~~~~~~~~~~

• 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