Compilare: user.cpp: In function ‘void solve1()’: user.cpp:81:15: warning: suggest explicit braces to avoid ambiguous ‘else’ [-Wparentheses] if(m1[i][j]==-1) ^ user.cpp: In function ‘int main()’: user.cpp:148:21: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘short int*’ [-Wformat=] scanf("%d\n", &n); ^ user.cpp:157:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<k; i++) ^ user.cpp:159:32: warning: format ‘%d’ expects argument of type ‘int*’, but argument 2 has type ‘short int*’ [-Wformat=] scanf("\n%d %d", &x, &y); ^ user.cpp:159:32: warning: format ‘%d’ expects argument of type ‘int*’, but argument 3 has type ‘short int*’ [-Wformat=] user.cpp:146:31: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ai.in","r",stdin); ^ user.cpp:147:33: warning: ignoring return value of ‘FILE* freopen(const char*, const char*, FILE*)’, declared with attribute warn_unused_result [-Wunused-result] freopen("ai.out","w",stdout); ^ user.cpp:148:22: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d\n", &n); ^ user.cpp:149:113: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d %d %d %d %d %d %d\n", &t.x, &t.y, &s1.x, &s1.y, &s2.x, &s2.y, &r1.x, &r1.y, &r2.x, &r2.y); ^ user.cpp:155:19: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&k); ^ user.cpp:159:33: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] scanf("\n%d %d", &x, &y); ^