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Fenwick Range Update type fix #79

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Fenwick Range Update type fix #79

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4 changes: 2 additions & 2 deletions ch2/ourown/fenwicktree_ds.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -67,7 +67,7 @@ class RUPQ { // RUPQ variant
FenwickTree ft; // internally use PURQ FT
public:
RUPQ(int m) : ft(FenwickTree(m)) {}
void range_update(int ui, int uj, int v) {
void range_update(int ui, int uj, ll v) {
ft.update(ui, v); // [ui, ui+1, .., m] +v
ft.update(uj+1, -v); // [uj+1, uj+2, .., m] -v
} // [ui, ui+1, .., uj] +v
Expand All @@ -80,7 +80,7 @@ class RURQ { // RURQ variant
FenwickTree purq; // one PURQ
public:
RURQ(int m) : rupq(RUPQ(m)), purq(FenwickTree(m)) {} // initialization
void range_update(int ui, int uj, int v) {
void range_update(int ui, int uj, ll v) {
rupq.range_update(ui, uj, v); // [ui, ui+1, .., uj] +v
purq.update(ui, v*(ui-1)); // -(ui-1)*v before ui
purq.update(uj+1, -v*uj); // +(uj-ui+1)*v after uj
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