//#pragma GCC optimize ("O3")
//#pragma GCC target ("sse4")
#include <bits/stdc++.h>
using namespace std;
template<class T> using min_heap = priority_queue<T, vector<T>, greater<T>>;
#define FOR(i, a, b) for (int i=a; i<(b); i++)
#define F0R(i, a) for (int i=0; i<(a); i++)
#define F0R1(i, a) for (int i=1; i<=(a); i++)
#define FORd(i, a, b) for (int i = (b)-1; i >= a; i--)
#define F0Rd(i, a) for (int i = (a)-1; i >= 0; i--)
#define trav(a, x) for (auto& a : x)
#define MIN(a, b) a = min(a, b)
#define MAX(a, b) a = max(a, b)
#define INF 1000000010
#define LL_INF 4500000000000000000LL
#define LSOne(S) (S & (-S))
#define EPS 1e-9
#define pA first
#define pB second
#define mp make_pair
#define mt make_tuple
#define pb push_back
#define eb emplace_back
#define PI acos(-1.0)
// #define MOD (int)(2e+9+11)
#define MOD (int)(1e+9+7)
#define SET(vec, val, size) for (int i = 0; i < size; i++) vec[i] = val;
#define SET2D(arr, val, dim1, dim2) F0R(i, dim1) F0R(j, dim2) arr[i][j] = val;
#define SET3D(arr, val, dim1, dim2, dim3) F0R(i, dim1) F0R(j, dim2) F0R(k, dim3) arr[i][j][k] = val;
#define SET4D(arr, val, dim1, dim2, dim3, dim4) F0R(i, dim1) F0R(j, dim2) F0R(k, dim3) F0R(l, dim4) arr[i][j][k][l] = val;
#define lb lower_bound
#define ub upper_bound
#define sz(x) (int)x.size()
#define beg(x) x.begin()
#define en(x) x.end()
#define all(x) beg(x), en(x)
#define resz resize
#define SORT(vec) sort(all(vec))
#define RSORT(vec) sort(vec.rbegin(),vec.rend())
typedef long long ll;
typedef long double ld;
typedef unsigned long long ull;
typedef pair<int, int> ii;
typedef pair<int, ii> iii;
typedef pair<ll, ll> pll;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<iii> viii;
typedef vector<ll> vl;
// @formatter:off
// Source: Benq (https://github.com/bqi343/USACO) [Modified]
namespace input {
template<class T> void re(complex<T>& x);
template<class T1, class T2> void re(pair<T1,T2>& p);
template<class T> void re(vector<T>& a);
template<class T, size_t SZ> void re(array<T,SZ>& a);
template<class T> void reA(T A[], int sz);
template<class T> void re(T& x) { cin >> x; }
void re(double& x) { string t; re(t); x = stod(t); }
void re(ld& x) { string t; re(t); x = stold(t); }
template<class Arg, class... Args> void re(Arg& first, Args&... rest) {
re(first); re(rest...);
}
template<class T1, class T2> void re(pair<T1,T2>& p) { re(p.pA,p.pB); }
template<class T> void re(vector<T>& a) { F0R(i,sz(a)) re(a[i]); }
template<class T, size_t SZ> void re(array<T,SZ>& a) { F0R(i,SZ) re(a[i]); }
template<class T> void reA(T A[], int sz) { F0R(i, sz) re(A[i]); }
void setupIO(const string &PROB = "") {
ios::sync_with_stdio(false);
cin.tie(nullptr);
if (PROB.length() != 0) {
ifstream infile(PROB + ".in");
if (infile.good()) {
freopen((PROB + ".in").c_str(), "r", stdin);
freopen((PROB + ".out").c_str(), "w", stdout);
}
}
}
}
using namespace input;
namespace output {
template<class T1, class T2> void prD(const pair<T1,T2>& x);
template<class T, size_t SZ> void prD(const array<T,SZ>& x);
template<class T> void prD(const vector<T>& x);
template<class T> void prD(const set<T>& x);
template<class T1, class T2> void prD(const map<T1,T2>& x);
template<class T1, class T2> void pr(const pair<T1,T2>& x);
template<class T, size_t SZ> void pr(const array<T,SZ>& x);
template<class T> void pr(const vector<T>& x);
template<class T> void pr(const set<T>& x);
template<class T1, class T2> void pr(const map<T1,T2>& x);
template<class T> void prD(const T& x) { cout << x; }
template<class Arg, class... Args> void prD(const Arg& first, const Args&... rest) {
prD(first); prD(rest...);
}
template<class T1, class T2> void prD(const pair<T1,T2>& x) {
prD("{",x.pA,", ",x.pB,"}");
}
template<class T> void prDContain(const T& x) {
prD("{");
bool fst = 1; for (const auto& a: x) prD(!fst?", ":"",a), fst = 0; // const needed for vector<bool>
prD("}");
}
template<class T, size_t SZ> void prD(const array<T,SZ>& x) { prDContain(x); }
template<class T> void prD(const vector<T>& x) { prDContain(x); }
template<class T> void prD(const set<T>& x) { prDContain(x); }
template<class T1, class T2> void prD(const map<T1,T2>& x) { prDContain(x); }
void psD() { prD("\n"); }
template<class Arg> void psD(const Arg& first) {
prD(first); psD(); // no space at end of line
}
template<class Arg, class... Args> void psD(const Arg& first, const Args&... rest) {
prD(first," "); psD(rest...); // print w/ spaces
}
template<class T> void pr(const T& x) { cout << x; }
template<class Arg, class... Args> void pr(const Arg& first, const Args&... rest) {
pr(first); pr(rest...);
}
template<class T1, class T2> void pr(const pair<T1,T2>& x) {
pr(x.pA, " ", x.pB);
}
template<class T> void prContain(const T& x) {
bool fst = 1; for (const auto& a: x) pr(!fst?" ":"",a), fst = 0; // const needed for vector<bool>
}
template<class T, size_t SZ> void pr(const array<T,SZ>& x) { prContain(x); }
template<class T> void pr(const vector<T>& x) { prContain(x); }
template<class T> void pr(const set<T>& x) { prContain(x); }
template<class T1, class T2> void pr(const map<T1,T2>& x) { prContain(x); }
void ps() { pr("\n"); }
template<class Arg> void ps(const Arg& first) {
pr(first); ps(); // no space at end of line
}
template<class Arg, class... Args> void ps(const Arg& first, const Args&... rest) {
pr(first," "); ps(rest...); // print w/ spaces
}
}
using namespace output;
// @formatter:on
/* ============================ */
class Solve {
private:
map<int, int> delta;
vii A;
int offset[100000];
int curOffset = 0;
int ans = 0;
int curLine = 0;
void add(int i) {
int a = A[i].pA, b = A[i].pB;
if (b > 0) {
if (a >= curOffset) {
delta[a]++;
delta[a+b]--;
} else if (a+b > curOffset) {
delta[a]--;
delta[a+b]--;
} else {
delta[a+b]++;
delta[a]--;
}
} else {
if (a <= curOffset) {
delta[a]++;
delta[a+b]--;
} else if (a+b < curOffset) {
delta[a]--;
delta[a+b]--;
} else {
delta[a]--;
delta[a+b]++;
}
}
}
void remove(int i) {
int a = A[i].pA, b = A[i].pB;
if (b > 0) {
if (a >= curOffset) {
delta[a]--;
delta[a+b]++;
} else if (a+b > curOffset) {
delta[a]++;
delta[a+b]++;
} else {
delta[a+b]--;
delta[a]++;
}
} else {
if (a <= curOffset) {
delta[a]--;
delta[a+b]++;
} else if (a+b < curOffset) {
delta[a]++;
delta[a+b]++;
} else {
delta[a]++;
delta[a+b]--;
}
}
}
public:
Solve(const vii &input) {
A = input;
SET(offset, 0, 100000);
F0R(i, sz(A)) {
if (A[i].pA > 0 && A[i].pA + A[i].pB < 0) ans++;
if (A[i].pA < 0 && A[i].pA + A[i].pB > 0) ans++;
}
FOR(i, 1, sz(A)) {
add(i);
}
}
// move line back
void B() {
if (curLine == 0) return;
int offsetDiff = curOffset - offset[curLine];
A[curLine].pA += offsetDiff;
add(curLine);
curLine--;
}
// move line forward
void F() {
if (curLine == sz(A)-1) return;
offset[++curLine] = curOffset;
remove(curLine);
}
// change line
void change(int newVal) {
int cng = A[curLine].pB - newVal;
int newOffset = curOffset + cng;
FOR(i, min(curOffset, newOffset), max(curOffset, newOffset) + 1) {
if (delta.count(i)) {
ans += delta[i];
delta[i] *= -1;
}
}
if (A[curLine].pA > offset[curLine] && A[curLine].pA + A[curLine].pB < offset[curLine]) ans--;
if (A[curLine].pA < offset[curLine] && A[curLine].pA + A[curLine].pB > offset[curLine]) ans--;
curOffset = newOffset;
A[curLine].pB = newVal;
if (A[curLine].pA > offset[curLine] && A[curLine].pA + A[curLine].pB < offset[curLine]) ans++;
if (A[curLine].pA < offset[curLine] && A[curLine].pA + A[curLine].pB > offset[curLine]) ans++;
}
int qry() {
return ans;
}
};
int main() {
setupIO();
int n; re(n);
vector<ii> X, Y;
int x = 1, y = 1;
F0R(i, n) {
int a, b; re(a, b);
X.eb(x, a);
Y.eb(y, b);
x += a; y += b;
}
Solve xx(X), yy(Y);
int m; re(m);
F0R(i, m) {
char c; re(c);
if (c == 'B') {
xx.B(); yy.B();
} else if (c == 'F') {
xx.F(); yy.F();
} else if (c == 'C') {
re(x, y);
xx.change(x); yy.change(y);
} else {
ps(xx.qry() + yy.qry());
}
}
return 0;
}
Compilation message
ruka.cpp: In function 'void input::setupIO(const string&)':
ruka.cpp:85:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
freopen((PROB + ".in").c_str(), "r", stdin);
~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
ruka.cpp:86:24: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
freopen((PROB + ".out").c_str(), "w", stdout);
~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
1144 KB |
Output is correct |
| 2 |
Correct |
4 ms |
1144 KB |
Output is correct |
| 3 |
Correct |
18 ms |
1272 KB |
Output is correct |
| 4 |
Correct |
33 ms |
1272 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
1144 KB |
Output is correct |
| 2 |
Correct |
4 ms |
1144 KB |
Output is correct |
| 3 |
Correct |
18 ms |
1272 KB |
Output is correct |
| 4 |
Correct |
33 ms |
1272 KB |
Output is correct |
| 5 |
Correct |
287 ms |
4300 KB |
Output is correct |
| 6 |
Correct |
696 ms |
3460 KB |
Output is correct |
| 7 |
Correct |
410 ms |
4020 KB |
Output is correct |
| 8 |
Correct |
440 ms |
4200 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
5 ms |
1144 KB |
Output is correct |
| 2 |
Correct |
4 ms |
1144 KB |
Output is correct |
| 3 |
Correct |
18 ms |
1272 KB |
Output is correct |
| 4 |
Correct |
33 ms |
1272 KB |
Output is correct |
| 5 |
Correct |
287 ms |
4300 KB |
Output is correct |
| 6 |
Correct |
696 ms |
3460 KB |
Output is correct |
| 7 |
Correct |
410 ms |
4020 KB |
Output is correct |
| 8 |
Correct |
440 ms |
4200 KB |
Output is correct |
| 9 |
Execution timed out |
2040 ms |
6264 KB |
Time limit exceeded |
| 10 |
Halted |
0 ms |
0 KB |
- |
