#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>
#define vi vector<int>
#define ve vector
#define ll long long
#define vl vector<ll>
#define vll vector<pair<ll,ll>>
#define onbit __builtin_popcount
#define ii pair<int,int>
#define vvi vector<vi>
#define vii vector<ii>
#define gii greater<ii>
#define pb push_back
#define mp make_pair
#define fi first
#define se second
#define INF 1e18
#define eps 1e-7
#define eps1 1e-2
#define optimise ios_base::sync_with_stdio(false);cin.tie(NULL);cout.tie(NULL);
#define MAX_A 1e5+5
using namespace std;
using namespace __gnu_pbds;
template <class T>
using Tree = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
const ll MOD = 1e9+9;
const int nax = 2e3+5;
const int MAX_VAL = 1e6;
double PI=3.14159265359;
int arx[8]={1,1,0,-1,-1,-1, 0, 1};
int ary[8]={0,1,1, 1, 0,-1,-1,-1};
void setIO(string s) {
freopen((s + ".in").c_str(), "r", stdin);
freopen((s + ".out").c_str(), "w", stdout);
}
int vis[nax];
int main(){
optimise;
/*#ifndef ONLINE_JUDGE
freopen("input.txt", "r", stdin);
freopen("output.txt", "w", stdout);
#endif*/
//setIO("redistricting");
int n;
string t;
cin>>n;
cin>>t;
int q;cin>>q;
while(q--)
{
for (int i = 0; i < n; ++i)
{
vis[i]=0;
}
int l,r;
cin>>l>>r;
l--;r--;
int cur=0;
for (int i = l; i <= r; ++i)
{
if (t[i]=='C') cur++;
else cur--;
if (cur<0){
vis[i]=true;
}
}cur=0;
for(int i=r;i>=l;i--)
{
if (t[i]=='C') cur++;
else if (t[i]=='T'&&vis[i]==0) cur--;
if (cur<0){
vis[i]=true;
}
}
int res=0;
for (int i = l; i <= r; ++i)
{
if (vis[i]==true&&t[i]=='T')res++;
}
int ans=res;
for (int i = 0; i < n; ++i)
{
vis[i]=0;
}cur=0;
for(int i=r;i>=l;i--)
{
if (t[i]=='C') cur++;
else cur--;
if (cur<0){
vis[i]=true;
}
}cur=0;
for (int i = l; i <= r; ++i)
{
if (t[i]=='C') cur++;
else if(vis[i]==0) cur--;
if (cur<0){
vis[i]=true;
}
}res=0;
for (int i = l; i <= r; ++i)
{
if (vis[i]==true&&t[i]=='T')res++;
}
ans=min(ans,res);
cout << ans<<endl;
}
}
Compilation message
election.cpp: In function 'void setIO(std::string)':
election.cpp:33:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
33 | freopen((s + ".in").c_str(), "r", stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
election.cpp:34:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
34 | freopen((s + ".out").c_str(), "w", stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
16 ms |
340 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
16 ms |
340 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
16 ms |
340 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
