Skip to content

Instantly share code, notes, and snippets.

@ctylim
Created November 3, 2015 17:35
Show Gist options
  • Star 0 You must be signed in to star a gist
  • Fork 0 You must be signed in to fork a gist
  • Save ctylim/f8c2131a2b6211474550 to your computer and use it in GitHub Desktop.
Save ctylim/f8c2131a2b6211474550 to your computer and use it in GitHub Desktop.
yukicoder No.259
#include <iostream>
#include <iomanip>
#include <vector>
#include <algorithm>
#include <numeric>
#include <functional>
#include <cmath>
#include <queue>
#include <stack>
#include <set>
#include <map>
#include <sstream>
#include <string>
#define repd(i,a,b) for (int i=(a);i<(b);i++)
#define rep(i,n) repd(i,0,n)
#define var auto
#define mod 1000000007
#define inf 2147483647
typedef long long ll;
using namespace std;
int inputValue(){
int a;
cin >> a;
return a;
}
template <typename T>
void output(T a, int precision) {
if(precision > 0){
cout << fixed << setprecision(precision) << a << "\n";
}
else{
cout << a << "\n";
}
}
// end of template
struct bit {
vector<ll> v; // 部分和をbitで管理 仮想配列はa[1...n]
bit(int n){ // bit(int n) : v(n + 1) {}
v.resize(n + 1);
}
ll sum(int i){ // 仮想配列a[1]~a[i]の和を求める
ll ret = 0;
for(; i > 0; i -= i & -i){ // i & -i: iの1が立っている最高位bitをの2^を返す
ret += v[i];
}
return ret;
}
void add(int i, ll w) { // index:iにwを加える
for (; i < v.size(); i += i & -i) {
v[i] += w;
}
}
};
int N;
int mod2N(int i){ // return 1 ~ 2N
i -= 1;
return ((i % (2 * N)) + 2 * N) % (2 * N) + 1;
}
int main() {
// source code
N = inputValue();
int Q = inputValue();
bit b(2 * N);
rep(i, Q){
char c;
cin >> c;
int t = inputValue();
int y = inputValue();
int z = inputValue();
if (c == 'R') { // right
b.add(mod2N(y - t + 1), z);
}
if (c == 'L') { // left
b.add(mod2N(2 * N - y - t), z);
}
if (c == 'C') { // count
int l1 = mod2N(y - t);
int r1 = mod2N(z - t);
int l2 = mod2N(2 * N - z - t);
int r2 = mod2N(2 * N - y - t);
ll ret1 = b.sum(r1) - b.sum(l1);
ll ret2 = b.sum(r2) - b.sum(l2);
if (l1 > r1) {
ret1 += b.sum(2 * N);
}
if (l2 > r2) {
ret2 += b.sum(2 * N);
}
output(ret1 + ret2, 0);
}
}
return 0;
}
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment