Submission #551082

#	Time	Username	Problem	Language	Result	Execution time	Memory
551082		tatyam	Game (IOI13_game)	C++17	63 / 100	2068 ms	256000 KiB

game

#include <bits/stdc++.h>
using namespace std;
using u32 = uint32_t;
using u64 = uint64_t;

u32 R, C;
struct DynamicSegTree2D{
    unordered_map<u32, unordered_map<u32, u64>> seg;
    void set(u32 i, u32 j, u64 x){
        seg[i][j] = x;
        for(int jj = j; jj >>= 1; ) seg[i][jj] = gcd(seg[i][jj << 1], seg[i][jj << 1 | 1]);
        for(int ii = i; ii >>= 1; ) seg[ii][j] = gcd(seg[ii << 1][j], seg[ii << 1 | 1][j]);
        for(int ii = i; ii >>= 1; ){
            auto& s = seg[ii];
            for(int jj = j; jj >>= 1; ) s[jj] = gcd(s[jj << 1], s[jj << 1 | 1]);
        }
    }
    u64 get(const unordered_map<u32, u64>& s, u32 j) const {
        auto p = s.find(j);
        if(p == s.end()) return 0;
        return p->second;
    }
    u64 get(u32 i, u32 l, u32 r) const {
        auto p = seg.find(i);
        if(p == seg.end()) return 0;
        auto& s = p->second;
        u64 ans = 0;
        while(l < r){
            if(l & 1) ans = gcd(ans, get(s, l++));
            if(r & 1) ans = gcd(ans, get(s, --r));
            l >>= 1;
            r >>= 1;
        }
        return ans;
    }
    u64 get(u32 l, u32 r, u32 y_l, u32 y_r) const {
        u64 ans = 0;
        while(l < r){
            if(l & 1) ans = gcd(ans, get(l++, y_l, y_r));
            if(r & 1) ans = gcd(ans, get(--r, y_l, y_r));
            l >>= 1;
            r >>= 1;
        }
        return ans;
    }
} seg;

extern "C" {

void init(int R_, int C_){
    R = 1;
    C = 1;
    while(R < R_) R <<= 1;
    while(C < C_) C <<= 1;
}

void update(int P, int Q, long long K){
    P += R;
    Q += C;
    seg.set(P, Q, K);
}

long long calculate(int P, int Q, int U, int V){
    P += R;
    Q += C;
    U += R + 1;
    V += C + 1;
    return seg.get(P, U, Q, V);
}

}

Compilation message (stderr)

game.cpp: In function 'void init(int, int)':
game.cpp:53:13: warning: comparison of integer expressions of different signedness: 'u32' {aka 'unsigned int'} and 'int' [-Wsign-compare]
   53 |     while(R < R_) R <<= 1;
      |           ~~^~~~
game.cpp:54:13: warning: comparison of integer expressions of different signedness: 'u32' {aka 'unsigned int'} and 'int' [-Wsign-compare]
   54 |     while(C < C_) C <<= 1;
      |           ~~^~~~

• Subtask 1: 10 / 10
• Subtask 2: 27 / 27
• Subtask 3: 26 / 26
• Subtask 4: 0 / 17
• Subtask 5: 0 / 20