#include <bits/stdc++.h> using namespace std; const int MAXN = 1010; bool anss[MAXN][MAXN]; void solve_test() { int n, m; scanf("%d %d", &n, &m); int ans = 0, best_A = -1; for(int A = 0; A <= n; A++) { int half = m / 2 + 1; int D = (m - half) * A; int need = max(0, n / 2 + 1 - (n - A)); int B; if(need == 0) B = m; else B = min(m, D / need); if(A + B > ans) { ans = A + B; best_A = A; } } printf("%d\n", ans); for(int i = 0; i < n; i++) { for(int j = 0; j < m; j++) { anss[i][j] = false; } } int s = 0; int half = m / 2 + 1; for(int i = 0; i < best_A; i++) { for(int j = 0; j < half; j++) { anss[i][(s + j) % m] = true; } s = (s + half) % m; } for(int i = 0; i < n; i++) { for(int j = 0; j < m; j++) { if(anss[i][j]) printf("+"); else printf("-"); } printf("\n"); } } int main() { int tests; scanf("%d", &tests); while(tests--) { solve_test(); } return 0; }

stones.cpp: In function 'void solve_test()':
stones.cpp:7:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d %d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~~
stones.cpp: In function 'int main()':
stones.cpp:45:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &tests);
     ~~~~~^~~~~~~~~~~~~~