#2235971

Solution for DSL_2_A: Range Minimum Query (RMQ) by Tsuta_J

Source Code Status Test Cases
    Policy: public     Reviewed: 23    
00.11 sec    4144 KB    50 lines     1172 bytes    2017-03-29 16:00
#include <bits/stdc++.h>
using namespace std;

int N, Q;
int const INF = INT_MAX;

struct SegmentTree {
private:
    int n;
    vector<int> node;

public:
    SegmentTree(vector<int> v) {
        int sz = v.size();
        n = 1; while(n < sz) n *= 2;
        node.resize(2*n-1, INF);
        for(int i=0; i<sz; i++) node[i+n-1] = v[i];
        for(int i=n-2; i>=0; i--) node[i] = min(node[2*i+1], node[2*i+2]);
    }

    void update(int x, int val) {
        x += (n - 1);
        node[x] = val;
        while(x > 0) {
            x = (x - 1) / 2;
            node[x] = min(node[2*x+1], node[2*x+2]);
        }
    }

    int getmin(int a, int b, int k=0, int l=0, int r=-1) {
        if(r < 0) r = n;
        if(r <= a || b <= l) return INF;
        if(a <= l && r <= b) return node[k];

        int vl = getmin(a, b, 2*k+1, l, (l+r)/2);
        int vr = getmin(a, b, 2*k+2, (l+r)/2, r);
        return min(vl, vr);
    }
};

int main() {
    cin >> N >> Q;
    SegmentTree seg( vector<int>(N, INF) );
    for(int i=0; i<Q; i++) {
        int c, x, y; cin >> c >> x >> y;
        if(c == 0) seg.update(x, y);
        else cout << seg.getmin(x, y+1) << endl;
    }    
}

Compile Error Logs:
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Status
Judge: 20/20 C++ CPU: 00.11 sec Memory: 4144 KB Length: 1172 B 2017-03-29 16:00 2017-03-29 16:00
Results for testcases
Case # Verdict CPU Time Memory In Out Case Name
Case #1: : Accepted 00.00 sec 3108 KB
Case #2: : Accepted 00.00 sec 3104 KB
Case #3: : Accepted 00.00 sec 3084 KB
Case #4: : Accepted 00.00 sec 3008 KB
Case #5: : Accepted 00.00 sec 3084 KB
Case #6: : Accepted 00.00 sec 3096 KB
Case #7: : Accepted 00.00 sec 2988 KB
Case #8: : Accepted 00.00 sec 3004 KB
Case #9: : Accepted 00.00 sec 3060 KB
Case #10: : Accepted 00.00 sec 3080 KB
Case #11: : Accepted 00.00 sec 3008 KB
Case #12: : Accepted 00.09 sec 3592 KB
Case #13: : Accepted 00.00 sec 3088 KB
Case #14: : Accepted 00.00 sec 3032 KB
Case #15: : Accepted 00.00 sec 3108 KB
Case #16: : Accepted 00.00 sec 3116 KB
Case #17: : Accepted 00.10 sec 4088 KB
Case #18: : Accepted 00.11 sec 4036 KB
Case #19: : Accepted 00.11 sec 4144 KB
Case #20: : Accepted 00.11 sec 4052 KB
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