Submission #286210

#	Time	Username	Problem	Language	Result	Execution time	Memory
286210		SomeoneUnknown	Red-blue table (IZhO19_stones)	C++14	100 / 100	9 ms	2304 KiB

stones

#include <bits/stdc++.h>
using namespace std;

int main(){
    int T;
    scanf("%d", &T);
    for(int t = 0; t < T; ++t){
        int r, c;
        scanf("%d %d", &r, &c);
        /*if(r == 2 && c == 1){
            printf("2\n+\n+\n");
            continue;
        }//*/
        char ans[r][c+1];
        for(int i = 0; i < r; ++i){
            ans[i][c] = '\0';
        }
        if(r > c){
            for(int i = 0; i < r; ++i){
                for(int j = 0; j < c; ++j){
                    ans[i][j] = '+';
                }
            }
            long long bestaddi = (long long) r * (((long long) c - 1) / 2) / (((long long) r) / 2 + 1);
            long long cur = 0;
            for(int i = 0; i < r; ++i){
                for(int j = 0; j < (c - 1) / 2; ++j){
                    ans[i][cur] = '-';
                    cur++;
                    cur %= bestaddi;
                }
            }
            printf("%lld\n", r+bestaddi);
            for(int i = 0; i < r; ++i){
                printf("%s\n", ans[i]);
            }
        }else{
            for(int i = 0; i < r; ++i){
                for(int j = 0; j < c; ++j){
                    ans[i][j] = '-';
                }
            }
            long long bestaddi = (long long) c * (((long long) r - 1) / 2) / (((long long) c) / 2 + 1);
            long long cur = 0;
            for(int i = 0; i < c; ++i){
                for(int j = 0; j < (r - 1) / 2; ++j){
                    ans[cur][i] = '+';
                    cur++;
                    cur %= bestaddi;
                }
            }
            printf("%lld\n", c+bestaddi);
            for(int i = 0; i < r; ++i){
                printf("%s\n", ans[i]);
            }
        }
    }
}

Compilation message (stderr)

stones.cpp: In function 'int main()':
stones.cpp:6:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    6 |     scanf("%d", &T);
      |     ~~~~~^~~~~~~~~~
stones.cpp:9:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
    9 |         scanf("%d %d", &r, &c);
      |         ~~~~~^~~~~~~~~~~~~~~~~

• Subtask 1: 17 / 17
• Subtask 2: 10 / 10
• Subtask 3: 16 / 16
• Subtask 4: 11 / 11
• Subtask 5: 15 / 15
• Subtask 6: 31 / 31