Submission #102678

#TimeUTC-0UsernameProblemLanguageResultExecution timeMemory
1026782019-03-26 17:34:41popovicirobertJousting tournament (IOI12_tournament)C++14
0 / 100
93 ms13304 KiB
#include <bits/stdc++.h>
#define lsb(x) (x & (-x))
using namespace std;
typedef vector <int> VI;
typedef vector <VI> VVI;
struct Fenwick {
VI aib;
int n;
inline void init(int _n) {
n = _n;
aib.resize(n + 1);
}
inline void clr() {
fill(aib.begin(), aib.end(), 0);
}
inline void update(int pos, int val) {
for(int i = pos; i <= n; i += lsb(i)) {
aib[i] += val;
}
}
inline int query(int pos) {
int ans = 0;
for(int i = pos; i > 0; i -= lsb(i)) {
ans += aib[i];
}
return ans;
}
 
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