Compilare: main.cpp: In function 'void scan()': main.cpp:38:28: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses] 38 | #define FOR(i,a,b) for(int (i)=(a);(i)<=(b);++(i)) | ^ main.cpp:80:2: note: in expansion of macro 'FOR' 80 | FOR(i,1,N) | ^~~ main.cpp:38:28: warning: unnecessary parentheses in declaration of 'j' [-Wparentheses] 38 | #define FOR(i,a,b) for(int (i)=(a);(i)<=(b);++(i)) | ^ main.cpp:81:2: note: in expansion of macro 'FOR' 81 | FOR(j,1,N) | ^~~ main.cpp: In function 'int cost(int, int)': main.cpp:39:28: warning: unnecessary parentheses in declaration of 'k1' [-Wparentheses] 39 | #define REP(i, N) for (int (i)=0;(i)<(int)(N);++(i)) | ^ main.cpp:96:2: note: in expansion of macro 'REP' 96 | REP(k1,2) | ^~~ main.cpp:39:28: warning: unnecessary parentheses in declaration of 'k2' [-Wparentheses] 39 | #define REP(i, N) for (int (i)=0;(i)<(int)(N);++(i)) | ^ main.cpp:97:2: note: in expansion of macro 'REP' 97 | REP(k2,2) | ^~~ main.cpp: In function 'void BFS(int, int, int, int, int (*)[1010][1010])': main.cpp:39:28: warning: unnecessary parentheses in declaration of 'k' [-Wparentheses] 39 | #define REP(i, N) for (int (i)=0;(i)<(int)(N);++(i)) | ^ main.cpp:117:2: note: in expansion of macro 'REP' 117 | REP(k,4) | ^~~ main.cpp:39:28: warning: unnecessary parentheses in declaration of 'k' [-Wparentheses] 39 | #define REP(i, N) for (int (i)=0;(i)<(int)(N);++(i)) | ^ main.cpp:141:4: note: in expansion of macro 'REP' 141 | REP(k,4) | ^~~ main.cpp:142:73: warning: array subscript has type 'char' [-Wchar-subscripts] 142 | if( ok(x + xx[k],y + yy[k]) && C[k & 1][x + xx[k] ][y + yy[k] ] > C[dir][x][y] + (dir != (k & 1)) ) | ^~~ main.cpp:145:44: warning: array subscript has type 'char' [-Wchar-subscripts] 145 | C[newdir][x + xx[k] ][y + yy[k] ] = C[dir][x][y] + (dir != newdir); | ^~~ main.cpp: In function 'void solve()': main.cpp:39:28: warning: unnecessary parentheses in declaration of 'k' [-Wparentheses] 39 | #define REP(i, N) for (int (i)=0;(i)<(int)(N);++(i)) | ^ main.cpp:165:2: note: in expansion of macro 'REP'