#include<bits/stdc++.h>
//#define int long long
#define pii pair<int,int>
#define fi first
#define se second
#pragma GCC target ("avx2")
#pragma GCC optimization ("O3")
#pragma GCC optimization ("unroll-loops")
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
using namespace std;
using ll = long long;
using ull = unsigned long long;
using ldb = long double;
const int N = (int)5e5;
const int maxN = (int)5e5 + 5;
const ll mod = 1e9 + 7;
//const int mod = 998244353;
const ll infty = 1e17;
const ll logn = 18;
const int base = 311;
const int Block_size = 500;
const int ep = 'a';
int cu[] = {0,0,1,-1};
int cv[] = {-1,1,0,0};
int du[] = {-1,-1,+1,1};
int dv[] = {-1,+1,-1,1};
int cled[] = {6,2,5,5,4,5,6,3,7,6};
void InputFile()
{
freopen(".inp","r",stdin);
freopen(".out","w",stdout);
//freopen("test.out","r",stdin);
}
void FastInput()
{
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
}
int n;
int dpr[401][401][401];
int dpg[401][401][401];
int dpy[401][401][401];
vector<int> save_r,save_g,save_y;
string s;
int Cal_R(int cr,int cg,int cy)
{
/*int now_pos = save_r[cr-1];
int moved = 0;
int k = upper_bound(save_g.begin(),save_g.end(),now_pos) - save_g.begin();
moved += max(0,cg - k);
k = upper_bound(save_y.begin(),save_y.end(),now_pos) - save_y.begin();
moved += max(0,cy - k);
return now_pos + moved - (cr + cg + cy);*/
return max(max(save_g[cg-1],save_r[cr-1]),save_y[cy-1]) - (cr + cg + cy);
}
int Cal_G(int cr,int cg,int cy)
{
/*int now_pos = save_g[cg-1];
int moved = 0;
int k = upper_bound(save_r.begin(),save_r.end(),now_pos) - save_r.begin();
moved += max(0,cr - k);
k = upper_bound(save_y.begin(),save_y.end(),now_pos) - save_y.begin();
moved += max(0,cy - k);*/
return max(max(save_g[cg-1],save_r[cr-1]),save_y[cy-1]) - (cr + cg + cy);
}
int Cal_Y(int cr,int cg,int cy)
{
/*int now_pos = save_y[cy-1];
int moved = 0;
int k = upper_bound(save_r.begin(),save_r.end(),now_pos) - save_r.begin();
moved += max(0,cr - k);
k = upper_bound(save_g.begin(),save_g.end(),now_pos) - save_g.begin();
moved += max(0,cg - k);
return now_pos + moved - (cr + cg + cy);*/
return max(max(save_g[cg-1],save_r[cr-1]),save_y[cy-1]) - (cr + cg + cy);
}
void Read()
{
cin >> n >> s;
s.insert(0,"?");
//save_r.push_back(mod);
//save_g.push_back(mod);
//save_y.push_back(mod);
for(int i = 1;i <= n;i++)
{
if(s[i] == 'R') save_r.push_back(i);
if(s[i] == 'G') save_g.push_back(i);
if(s[i] == 'Y') save_y.push_back(i);
}
/// init
for(int i = 1;i <= n;i++)
{
for(int cr = 0;cr <= n;cr++)
{
for(int cg = 0;cg <= n;cg++)
{
dpr[i][cr][cg] = mod;
dpg[i][cr][cg] = mod;
dpy[i][cr][cg] = mod;
}
}
}
dpr[0][0][0] = dpg[0][0][0] = dpy[0][0][0] = 0;
for(int i = 1;i <= n;i++)
{
for(int cr = 0;cr <= (int)save_r.size();cr++)
{
for(int cg = 0;cg <= (int)save_g.size();cg++)
{
int cy = i - cr - cg;
if(cy > save_y.size()) continue;
if(cr + cg > i) break;
if(cr > 0)
{
dpr[i][cr][cg] = min(dpg[i-1][cr-1][cg],dpy[i-1][cr-1][cg]) + Cal_R(cr,cg,cy);
}
if(cg > 0)
{
dpg[i][cr][cg] = min(dpr[i-1][cr][cg-1],dpy[i-1][cr][cg-1]) + Cal_G(cr,cg,cy);
}
if(cy > 0)
{
dpy[i][cr][cg] = min(dpr[i-1][cr][cg],dpg[i-1][cr][cg]) + Cal_Y(cr,cg,cy);
}
}
}
}
int res;
res = min(min(dpr[n][(int)save_r.size()][(int)save_g.size()],dpg[n][(int)save_r.size()][(int)save_g.size()]),dpy[n][(int)save_r.size()][(int)save_g.size()]);
if(res >= (int)1e9) res =-1;
cout << res;
}
void Solve()
{
}
void Debug()
{
//Main_sub();
//Naive();
}
int main()
{
FastInput();
//InputFile();
//int sub_type;
//cin >> sub_type;
//Sieve();
int test;
//cin >> test;
test = 1;
while(test--)
//for(int prc = 1; prc <= test; prc++)
{
Read();
Solve();
//Debug();
}
}
Compilation message
joi2019_ho_t3.cpp:7: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
7 | #pragma GCC optimization ("O3")
|
joi2019_ho_t3.cpp:8: warning: ignoring '#pragma GCC optimization' [-Wunknown-pragmas]
8 | #pragma GCC optimization ("unroll-loops")
|
joi2019_ho_t3.cpp: In function 'void Read()':
joi2019_ho_t3.cpp:123:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
123 | if(cy > save_y.size()) continue;
| ~~~^~~~~~~~~~~~~~~
joi2019_ho_t3.cpp: In function 'void InputFile()':
joi2019_ho_t3.cpp:35:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
35 | freopen(".inp","r",stdin);
| ~~~~~~~^~~~~~~~~~~~~~~~~~
joi2019_ho_t3.cpp:36:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
36 | freopen(".out","w",stdout);
| ~~~~~~~^~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
11 ms |
340 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
11 ms |
340 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
11 ms |
468 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
11 ms |
340 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
