Climbing Stairs
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Climbing Stairs
int climbStairs(int n) {
int f1 = 2;
int f2 = 1;
if(n == 1) {
return f2;
} else if(n == 2) {
return f1;
}
int fn=0;
for(int i = 3; i <= n; i++) {
fn = f1 + f2;
f2 = f1;
f1 = fn;
}
return fn;
}
int f1 = 2;
int f2 = 1;
if(n == 1) {
return f2;
} else if(n == 2) {
return f1;
}
int fn=0;
for(int i = 3; i <= n; i++) {
fn = f1 + f2;
f2 = f1;
f1 = fn;
}
return fn;
}
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