View Compilation Error

0_0_33922727_30445.cpp: In function 'int calc(int)':
0_0_33922727_30445.cpp:27:16: error: 'struct std::pair<const std::vector<int>, int>' has no member named 'x'
     auto v = t.x;
                ^
0_0_33922727_30445.cpp:36:26: error: 'struct std::pair<const std::vector<int>, int>' has no member named 'y'
     if (i==n) add(ans, t.y);
                          ^
0_0_33922727_30445.cpp:37:26: error: 'struct std::pair<const std::vector<int>, int>' has no member named 'y'
     else add(dp[i][v], t.y);
                          ^