C++ (Cpp) MAP::lower_bound Examples

Programming Language: C++ (Cpp)

Class/Type: MAP

Method/Function: lower_bound

Examples at hotexamples.com: 2

The cpp map lower_bound function is used to return an iterator pointing to the first element in the map whose key is not considered to go before the given key. It is part of the STL library.

Example 1:

std::map my_map;
my_map[1] = "one";
my_map[2] = "two";
my_map[4] = "four";
auto it = my_map.lower_bound(3);
std::cout << it->second << std::endl; // prints "four"

In this example, we create a map with integer keys and string values. We insert three elements into the map with keys 1, 2, and 4. We then call the lower_bound function with the key value of 3, which returns an iterator pointing to the element with key 4. We then print out the value of that element's associated string, which is "four".

Example 2:

std::map my_map;
my_map['a'] = 1;
my_map['b'] = 2;
my_map['c'] = 3;
auto it = my_map.lower_bound('d');
if (it == my_map.end()) {
    std::cout << "No element with key >= 'd' found in map\n";
}

In this example, we create a map with character keys and integer values. We insert three elements into the map with keys 'a', 'b', and 'c'. We then call the lower_bound function with the key value of 'd', which returns an iterator pointing to the end of the map since there is no element with a key greater than or equal to 'd'. We then check if the returned iterator is equal to the end iterator, and if so print out a message indicating that no element was found in the map. Package/library: STL (Standard Template Library)

C++ (Cpp) MAP::lower_bound - 2 examples found. These are the top rated real world C++ (Cpp) examples of MAP::lower_bound extracted from open source projects. You can rate examples to help us improve the quality of examples.

Frequently Used Methods

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end(30)

begin(25)

find(22)

insert(14)

GetZRegionMax(13)

GetXRegionMax(11)

getEmbedding(8)

RegionUserRemove(8)

size(8)

RegionUserAdd(6)

current_size(5)

next(5)

phi1(4)

getNbDarts(3)

storage(3)

erase(3)

GetMapSize(3)

lower_bound(2)

isOrbitEmbedded(2)

insertIndividualPoint(2)

setSize(2)

stat(2)

switchFree(2)

unbind(2)

clear(2)

IsRoomCheck(2)

context(2)

removeAttribute(1)

bind_modify_key(1)

bind_create_key(1)

newFace(1)

askDartBuffer(1)

openMap(1)

add_face(1)

phi2(1)

phi3(1)

rbegin(1)

recover_key(1)

remove(1)

dimension(1)

removeThreadId(1)

isInside(1)

rend(1)

saveMapBin(1)

add_dynamic_circle(1)

sewFaces(1)

addEmptyThreadId(1)

solve(1)

solve_smooth(1)

solved(1)

Example #1

Show file

File: 2371. Another Longest Increasing Subsequence Problem.cpp Project: dnr2/maratona

void update(MAP & p , pii x){
	
	MAP::iterator it = p.lower_bound(x.F), ini = it;
	if( it != p.end() && it->F == x.F && it->S <= x.S) return;
	if( it != p.begin() && (--it)->S <= x.S) return;
	it = ini;
	while( it != p.end() && it->S >= x.S) it++;
	p.erase( ini, it);
	p[x.F] = x.S;
}

Example #2

Show file

File: 2371. Another Longest Increasing Subsequence Problem.cpp Project: dnr2/maratona

bool napraia(pii x, const MAP & p  ){
	MAP::const_iterator it = p.lower_bound( x.F);
	if( it == p.begin()) return true;
	return (--it)->S >= x.S;
}