Submission #60719

#	Time	Username	Problem	Language	Result	Execution time	Memory
60719		SpaimaCarpatilor	Election (BOI18_election)	C++17	28 / 100	10 ms	640 KiB

election

#include<bits/stdc++.h>

using namespace std;

int N, M, v[2018], h[2018], s[2018], a[2018];
bool ap[2018];
char sir[2018];

int main ()
{
//freopen ("input", "r", stdin);
//freopen ("output", "w", stdout);

scanf ("%d\n", &N);
scanf ("%s", sir + 1);
for (int i=1; i<=N; i++)
    a[i] = (sir[i] == 'C' ? +1 : -1), s[i] = s[i - 1] + a[i];
scanf ("%d", &M);
while (M --)
{
    int L, R;
    scanf ("%d %d", &L, &R);
    int curr = 0, cnt = 0;
    for (int i=L; i<=R; i++)
        if (sir[i] == 'C') curr ++, ap[i] = 1;
        else
        if (curr == 0) cnt ++, ap[i] = 0;
        else curr --, ap[i] = 1;
    curr = 0;
    int mini = 0;
    for (int i=R; i>=L; i--)
        if (ap[i])
            curr += a[i],
            mini = min (mini, curr);
    printf ("%d\n", cnt - mini);
}

return 0;
}

Compilation message (stderr)

election.cpp: In function 'int main()':
election.cpp:14:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf ("%d\n", &N);
 ~~~~~~^~~~~~~~~~~~
election.cpp:15:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf ("%s", sir + 1);
 ~~~~~~^~~~~~~~~~~~~~~
election.cpp:18:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
 scanf ("%d", &M);
 ~~~~~~^~~~~~~~~~
election.cpp:22:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf ("%d %d", &L, &R);
     ~~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 28 / 28
• Subtask 2: 0 / 54
• Subtask 3: 0 / 18